Bootstrap 오류: "ai_agent_mcp_servers" 관계가 존재하지 않음 -- 마이그레이션 ID 충돌로 인한 문제

pfaffman · 3월 30, 2026, 3:36오후

Bootstrap가 다음 오류로 실패하고 있습니다:

PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist

추가 정보:

in /etc/nginx/conf.d/discourse.conf
I, [2026-03-30T15:32:25.835970 #1]  INFO -- : > cd /var/www/discourse && su discourse -c 'LOAD_PLUGINS=0 bundle exec rake plugin:pull_compatible_all'
discourse-citationwizard is already at latest compatible version
discourse-prometheus is already at latest compatible version
I, [2026-03-30T15:32:33.549352 #1]  INFO -- : > cd /var/www/discourse && su discourse -c 'bundle exec rake db:migrate'
gem install prometheus_exporter -v 2.2.0 -i /var/www/discourse/plugins/discourse-prometheus/gems/3.4.7 --no-document --ignore-dependencies --no-user-install
Successfully installed prometheus_exporter-2.2.0
1 gem installed
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled: (StandardError)

PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in 'PG::Connection#exec'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in 'PG::Connection#async_exec'
(eval at /var/www/discourse/lib/method_profiler.rb:38):24:in 'PG::Connection#async_exec'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/database_statements.rb:167:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements#perform_query'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:556:in 'block (2 levels) in ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:1022:in 'block in ActiveRecord::ConnectionAdapters::AbstractAdapter#with_raw_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/concurrency/null_lock.rb:9:in 'ActiveSupport::Concurrency::NullLock#synchronize'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:991:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#with_raw_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:555:in 'block in ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications/instrumenter.rb:58:in 'ActiveSupport::Notifications::Instrumenter#instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:1142:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#log'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:554:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:591:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#internal_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:137:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/query_cache.rb:27:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/database_statements.rb:40:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/schema_statements.rb:643:in 'ActiveRecord::ConnectionAdapters::SchemaStatements#add_column'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/schema_statements.rb:462:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::SchemaStatements#add_column'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration/default_strategy.rb:10:in 'ActiveRecord::Migration::DefaultStrategy#method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1055:in 'block in ActiveRecord::Migration#method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1021:in 'block in ActiveRecord::Migration#say_with_time'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1021:in 'ActiveRecord::Migration#say_with_time'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1044:in 'ActiveRecord::Migration#method_missing'
/var/www/discourse/plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb:5:in 'AddSelectedToolNamesToAiAgentMcpServers#change'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:990:in 'ActiveRecord::Migration#exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in 'block in FreedomPatches::SchemaMigrationDetails#exec_migration'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/benchmark-0.5.0/lib/benchmark.rb:305:in 'Benchmark.measure'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in 'FreedomPatches::SchemaMigrationDetails#exec_migration'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:974:in 'block (2 levels) in ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:973:in 'block in ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in 'ActiveRecord::ConnectionAdapters::ConnectionPool#with_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:972:in 'ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1186:in 'ActiveRecord::MigrationProxy#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1535:in 'block in ActiveRecord::Migrator#execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/transaction.rb:626:in 'block in ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/concurrency/null_lock.rb:9:in 'ActiveSupport::Concurrency::NullLock#synchronize'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/transaction.rb:623:in 'ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:367:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:359:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1586:in 'ActiveRecord::Migrator#ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1534:in 'ActiveRecord::Migrator#execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1508:in 'Array#each'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1508:in 'ActiveRecord::Migrator#migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1453:in 'block in ActiveRecord::Migrator#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1606:in 'ActiveRecord::Migrator#with_advisory_lock'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1453:in 'ActiveRecord::Migrator#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1260:in 'ActiveRecord::MigrationContext#up'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1235:in 'ActiveRecord::MigrationContext#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/tasks/database_tasks.rb:270:in 'ActiveRecord::Tasks::DatabaseTasks#migrate'
/var/www/discourse/lib/tasks/db.rake:267:in 'block (2 levels) in <main>'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/lib/tasks/db.rake:242:in 'block in <main>'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rake-13.3.1/exe/rake:27:in '<top (required)>'
/usr/local/bin/bundle:25:in 'Kernel#load'
/usr/local/bin/bundle:25:in '<main>'

Caused by:
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist (ActiveRecord::StatementInvalid)
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in 'PG::Connection#exec'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in 'PG::Connection#async_exec'
(eval at /var/www/discourse/lib/method_profiler.rb:38):24:in 'PG::Connection#async_exec'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/database_statements.rb:167:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements#perform_query'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:556:in 'block (2 levels) in ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:1022:in 'block in ActiveRecord::ConnectionAdapters::AbstractAdapter#with_raw_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/concurrency/null_lock.rb:9:in 'ActiveSupport::Concurrency::NullLock#synchronize'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:991:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#with_raw_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:555:in 'block in ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications/instrumenter.rb:58:in 'ActiveSupport::Notifications::Instrumenter#instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:1142:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#log'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:554:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:591:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#internal_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:137:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/query_cache.rb:27:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/database_statements.rb:40:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/schema_statements.rb:643:in 'ActiveRecord::ConnectionAdapters::SchemaStatements#add_column'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/schema_statements.rb:462:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::SchemaStatements#add_column'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration/default_strategy.rb:10:in 'ActiveRecord::Migration::DefaultStrategy#method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1055:in 'block in ActiveRecord::Migration#method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1021:in 'block in ActiveRecord::Migration#say_with_time'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1021:in 'ActiveRecord::Migration#say_with_time'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1044:in 'ActiveRecord::Migration#method_missing'
/var/www/discourse/plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb:5:in 'AddSelectedToolNamesToAiAgentMcpServers#change'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:990:in 'ActiveRecord::Migration#exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in 'block in FreedomPatches::SchemaMigrationDetails#exec_migration'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/benchmark-0.5.0/lib/benchmark.rb:305:in 'Benchmark.measure'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in 'FreedomPatches::SchemaMigrationDetails#exec_migration'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:974:in 'block (2 levels) in ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:973:in 'block in ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in 'ActiveRecord::ConnectionAdapters::ConnectionPool#with_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:972:in 'ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1186:in 'ActiveRecord::MigrationProxy#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1535:in 'block in ActiveRecord::Migrator#execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/transaction.rb:626:in 'block in ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/concurrency/null_lock.rb:9:in 'ActiveSupport::Concurrency::NullLock#synchronize'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/transaction.rb:623:in 'ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:367:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:359:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1586:in 'ActiveRecord::Migrator#ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1534:in 'ActiveRecord::Migrator#execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1508:in 'Array#each'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1508:in 'ActiveRecord::Migrator#migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1453:in 'block in ActiveRecord::Migrator#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1606:in 'ActiveRecord::Migrator#with_advisory_lock'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1453:in 'ActiveRecord::Migrator#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1260:in 'ActiveRecord::MigrationContext#up'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1235:in 'ActiveRecord::MigrationContext#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/tasks/database_tasks.rb:270:in 'ActiveRecord::Tasks::DatabaseTasks#migrate'
/var/www/discourse/lib/tasks/db.rake:267:in 'block (2 levels) in <main>'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/lib/tasks/db.rake:242:in 'block in <main>'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rake-13.3.1/exe/rake:27:in '<top (required)>'
/usr/local/bin/bundle:25:in 'Kernel#load'
/usr/local/bin/bundle:25:in '<main>'

Caused by:
PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist (PG::UndefinedTable)
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in 'PG::Connection#exec'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in 'PG::Connection#async_exec'
(eval at /var/www/discourse/lib/method_profiler.rb:38):24:in 'PG::Connection#async_exec'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/database_statements.rb:167:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements#perform_query'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:556:in 'block (2 levels) in ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:1022:in 'block in ActiveRecord::ConnectionAdapters::AbstractAdapter#with_raw_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/concurrency/null_lock.rb:9:in 'ActiveSupport::Concurrency::NullLock#synchronize'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:991:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#with_raw_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:555:in 'block in ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/notifications/instrumenter.rb:58:in 'ActiveSupport::Notifications::Instrumenter#instrument'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract_adapter.rb:1142:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#log'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:554:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#raw_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:591:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#internal_execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:137:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/query_cache.rb:27:in 'ActiveRecord::ConnectionAdapters::AbstractAdapter#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/database_statements.rb:40:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements#execute'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/schema_statements.rb:643:in 'ActiveRecord::ConnectionAdapters::SchemaStatements#add_column'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/postgresql/schema_statements.rb:462:in 'ActiveRecord::ConnectionAdapters::PostgreSQL::SchemaStatements#add_column'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration/default_strategy.rb:10:in 'ActiveRecord::Migration::DefaultStrategy#method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1055:in 'block in ActiveRecord::Migration#method_missing'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1021:in 'block in ActiveRecord::Migration#say_with_time'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1021:in 'ActiveRecord::Migration#say_with_time'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1044:in 'ActiveRecord::Migration#method_missing'
/var/www/discourse/plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb:5:in 'AddSelectedToolNamesToAiAgentMcpServers#change'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:990:in 'ActiveRecord::Migration#exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in 'block in FreedomPatches::SchemaMigrationDetails#exec_migration'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/benchmark-0.5.0/lib/benchmark.rb:305:in 'Benchmark.measure'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in 'FreedomPatches::SchemaMigrationDetails#exec_migration'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:974:in 'block (2 levels) in ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/benchmark.rb:17:in 'ActiveSupport::Benchmark.realtime'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:973:in 'block in ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in 'ActiveRecord::ConnectionAdapters::ConnectionPool#with_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:972:in 'ActiveRecord::Migration#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1186:in 'ActiveRecord::MigrationProxy#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1535:in 'block in ActiveRecord::Migrator#execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/transaction.rb:626:in 'block in ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.5/lib/active_support/concurrency/null_lock.rb:9:in 'ActiveSupport::Concurrency::NullLock#synchronize'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/transaction.rb:623:in 'ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:367:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/connection_adapters/abstract/database_statements.rb:359:in 'ActiveRecord::ConnectionAdapters::DatabaseStatements#transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1586:in 'ActiveRecord::Migrator#ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1534:in 'ActiveRecord::Migrator#execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1508:in 'Array#each'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1508:in 'ActiveRecord::Migrator#migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1453:in 'block in ActiveRecord::Migrator#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1606:in 'ActiveRecord::Migrator#with_advisory_lock'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1453:in 'ActiveRecord::Migrator#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1260:in 'ActiveRecord::MigrationContext#up'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/migration.rb:1235:in 'ActiveRecord::MigrationContext#migrate'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activerecord-8.0.5/lib/active_record/tasks/database_tasks.rb:270:in 'ActiveRecord::Tasks::DatabaseTasks#migrate'
/var/www/discourse/lib/tasks/db.rake:267:in 'block (2 levels) in <main>'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/lib/tasks/db.rake:242:in 'block in <main>'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rake-13.3.1/exe/rake:27:in '<top (required)>'
/usr/local/bin/bundle:25:in 'Kernel#load'
/usr/local/bin/bundle:25:in '<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
== 20260319070000 AddSelectedToolNamesToAiAgentMcpServers: migrating ==========

pfaffman · 3월 30, 2026, 3:47오후

자, ask.discourse.com이 작성한 버그 리포트가 하나 들어왔는데, 먼저 이 부분이 제안한 내용을 공유하고 싶다:

나는 직설적이고 짧게 하지 않고, 그냥 그 자체로 두기로 했다. (바닥을 구르진 않았지만, 정말로 소리 내어 웃었다.

이것은 신뢰할 만한 리포트로 보이고, 내가 썼더라면보다 더 나은 내용일 것이다.

ask . . . 에서 온 버그 리포트

Meta에 게시할 수 있는 간결한 버그 리포트:

업데이트 후, `db:migrate` 중에 bootstrap이 다음과 같은 오류로 실패합니다:

```text
PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist

실패하는 마이그레이션은 다음과 같습니다:

/plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb

이 마이그레이션은 ai_agent_mcp_servers 테이블이 존재하기 전에 해당 테이블에 컬럼을 추가하려고 시도하는 것으로 보입니다.

로그의 관련 부분:

== 20260319070000 AddSelectedToolNamesToAiAgentMcpServers: migrating ==========
PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist
...
/var/www/discourse/plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb:5

이것은 discourse-ai의 마이그레이션 순서 문제이거나, ai_agent_mcp_servers를 생성해야 하는 이전 마이그레이션이 누락된 것으로 보입니다.

환경:

공식 Docker 설치
bootstrap이 bundle exec rake db:migrate에서 실패
로그에 표시된 플러그인에는 discourse-citationwizard와 discourse-prometheus가 포함됨

전체 리포트 / 로그:
Bootstrap error: relation “ai_agent_mcp_servers” does not exist

pfaffman · 3월 30, 2026, 3:53오후

내 목소리가 어떻게 들릴지 알아야 했어…

좋아 — 더 pfaffman 스타일에 가깝게 다듬은 버전이야:

이건 `discourse-ai` 마이그레이션 버그인 것 같아.

Bootstrap이 여기서 죽어:

```text
/plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb

에러 내용:

PG::UndefinedTable: ERROR:  relation "ai_agent_mcp_servers" does not exist

즉, 해당 마이그레이션은 아직 생성되지 않은 테이블을 수정하려고 시도하고 있어.

plugins/discourse-ai/db/migrate/20260319000001_create_ai_agent_mcp_servers.rb

61da54b54


      
          create_table :ai_agent_mcp_servers do |t|
            t.bigint :ai_agent_id, null: false
            t.bigint :ai_mcp_server_id, null: false
            t.timestamps
          end

github.com/discourse/discourse

plugins/discourse-ai/db/migrate/20260319070000_add_selected_tool_names_to_ai_agent_mcp_servers.rb

61da54b54


      
          add_column :ai_agent_mcp_servers, :selected_tool_names, :jsonb

이것들은 올바른 순서로 배치되어 있는 것으로 보입니다…

로그에서 첫 번째 마이그레이션이 실행되었음을 나타내는 증거를 확인하시나요?

(참고로, 저는 OP에서 작성하신 원래의 사람이 직접 작성한 보고서를 더 선호합니다. 사실에 충실하고, 잠재적으로 잘못된 결론으로 이어지지 않으므로요.)

pfaffman · 3월 30, 2026, 4:22오후

아하. 무슨 일이 있었는지 설명드릴게요. 우리가 둘 다 AI를 사용했고, 그 AI가 멍청하고 게으르다 보니 생긴 문제인 것 같습니다. 다른 설명으로는 운이 나빴다는 것인데, Claude(제가 사용한 도구)은 타임스탬프가 아니라 날짜 스탬프만 생성하고 카운터를 추가하는 방식인 것 같습니다(아니, Claude, 이건 좀 별로네). 그래서 우리가 같은 날 작업하게 된 겁니다.

최근 실행된 마이그레이션 몇 개를 보여드리겠습니다:

   up     20260316000001  Create discourse citationwizard openalex api keys
   up     20260316000002  Create discourse citationwizard api key daily snapshots
   up     20260316071735  Rename automation api key scope resource
   up     20260316071736  Rename ai api key scope resource
   up     20260316071737  Rename data explorer api key scope resource
   up     20260319000000  ********** NO FILE **********
   up     20260319000001  Create discourse citationwizard user lookup events
   up     20260319000002  Create discourse citationwizard citation wizard sessions
   up     20260319033623  ********** NO FILE **********
   up     20260319055039  ********** NO FILE **********

그리고 discourse-citationwizard(학자를 위한 인용/참고 도구인 https://www.citationwizard.net/을 지원하는 플러그인)도 같은 날 마이그레이션을 만들었습니다. 그 마이그레이션이 좀 의심스러워 보였지만, 이런 식의 영향이 있을 거라고는 상상도 못 했죠… .

그래서 plugins/discourse-ai/db/migrate/20260319000001_create_ai_agent_mcp_servers.rb가 실행되지 않는 것입니다.

또한 불행하게도 제 마이그레이션이 먼저 실행되었습니다(제 코드를 수정하는 것이 상대방의 코드를 수정하는 것보다 훨씬 쉬니까요). 지금은 마이그레이션 테이블에서 제 마이그레이션 이름을 변경할 수 있는지 확인하고 있습니다… .

david · 3월 30, 2026, 4:27오후

우리는 AI-AGENTS.md에 이 지침을 가지고 있습니다:

github.com/discourse/discourse

AI-AGENTS.md

61da54b54


      
          - Use `bin/rails generate migration` for new migrations

하지만 무시하는 것 같습니다

@sam 이 discourse-ai 마이그레이션을 만들 때 특정 스킬이나 프롬프트를 사용하셨나요? 0000으로 끝나는 의심스러운 숫자 대신 실제 타임스탬프를 사용할 수 있다면 충돌을 피하는 데 정말 도움이 될 것입니다

pfaffman · 3월 30, 2026, 5:01오후

저는 여러분의 저장소에서 이 명령을 실행하여 여러분의 AI에 대한 뛰어난 지식을 활용했습니다. 그리고 이제 저는 전문가 팀도 제가 한 것보다 더 잘할 수 없다는 것을 입증받았으니, 기분이 좋습니다!

그래서, 네, Claude, 왜 GENERATE MIGRATION을 사용하지 않나요!?!?!

데이터베이스의 마이그레이션 버전을 다음과 같이 변경했습니다:

UPDATE schema_migrations 
SET version   = '20260319001231' 
WHERE version = '20260319000001';

그리고 플러그인 내의 마이그레이션 이름을 이에 맞게 변경했습니다. 이렇게 하니 해결되었습니다!

저는 discourse main 브랜치를 더 자주 풀링하지 않은 것을 제 탓으로 돌릴 수 있겠지만, 같은 날 일어난 일이었기 때문에 매일 풀링했더라도 도움이 되지 않았을 것입니다. 아마도 푸시하기 전에 main 브랜치를 풀링하고 마이그레이션을 한 번 더 실행해야 할 것 같습니다. 하지만 이런 마이그레이션 문제는 다시는 일어나지 않게 하겠습니다.

도와주셔서 정말 감사합니다. 이 문제는 확실히 기이한 엣지 케이스였고, 우리가 같은 날 AI를 사용했더라면 절대 발생하지 않았을 것입니다.

sam · 3월 30, 2026, 9:12오후

네, 이 지침은 자주 무시되곤 해요. 계속 수정해야 하는 상황이 반복됩니다.

마이그레이션 방법을 안내하는 스킬을 추가해볼 수 있지만, 여기서 원자적(atomic)으로 문제를 해결하는 방법은 린트(lint)를 적용하는 것일 수도 있겠네요. 확신은 없어요.

pfaffman · 3월 31, 2026, 2:27오후

네, 그게 통할 수도 있겠네요. 린트는 AI가 아니니까 항상 지시를 따르니까요.

레일즈(rails)가 마이그레이션을 작성하라는 요청을 무시한다면, 마이그레이션 ID/파일명이 무엇이어야 하는지를 명시하는 규칙을 만들면 해결될 수도 있겠네요.

확실히 하기 위해 00001로 끝나는 마이그레이션들을 주시하고 있겠습니다. 이제 그게 단순히 호기심 때문이 아니라 위험하다는 걸 알았으니, 아마도 잊지 않을 것 같습니다.

Falco · 4월 2, 2026, 2:30오후

실패하던 마이그레이션을 이 이슈로 다시 진행해야 했어요.

제 친구는 그걸 별로 좋아하지 않았죠

pfaffman · 4월 2, 2026, 3:48오후

내 친구는 성격이 그렇게 강하지 않아요. 안도감을 느끼는 건지, 아니면 부러운 건지 모르겠어요!

글		댓글	조회수
Dev migration error: Discourse AI Development ai	7	243	7월 30, 2025
Upgrade failed: ERROR: relation "idx_regular_post_search_data" already exists Self-hosting	2	721	8월 21, 2020
PG::UndefinedTable: ERROR: relation "voice_rooms" does not exist Self-hosting	6	102	9월 3, 2026
Relation "scheduler_stats" does not exist Support	2	1440	8월 7, 2016
Update failed for some reason? Self-hosting	1	741	3월 30, 2022

Bootstrap 오류: "ai_agent_mcp_servers" 관계가 존재하지 않음 -- 마이그레이션 ID 충돌로 인한 문제

ask . . . 에서 온 버그 리포트

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