Unable to restore backup data, unique index is duplicated

I am trying to restore from backup and its failing.
Can anyone help?
Here is the error

[2020-04-10 22:41:19] Marking restore as running...
[2020-04-10 22:41:19] Making sure /var/www/discourse/tmp/restores/default/2020-04-10-224119 exists...
[2020-04-10 22:41:19] Copying archive to tmp directory...
[2020-04-10 22:41:20] Unzipping archive, this may take a while...
[2020-04-10 22:41:21] Extracting dump file...
[2020-04-10 22:41:23] Validating metadata...
[2020-04-10 22:41:23]   Current version: 20200408121834
[2020-04-10 22:41:23]   Restored version: 20181129094518
[2020-04-10 22:41:23] Enabling readonly mode...
[2020-04-10 22:41:23] Pausing sidekiq...
[2020-04-10 22:41:23] Waiting up to 60 seconds for Sidekiq to finish running jobs...
[2020-04-10 22:41:30] Creating missing functions in the discourse_functions schema...
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] CREATE INDEX
[2020-04-10 22:41:44] ALTER TABLE
[2020-04-10 22:41:44] ALTER TABLE
[2020-04-10 22:41:44] ALTER TABLE
[2020-04-10 22:41:44] ALTER TABLE
[2020-04-10 22:41:44] ALTER TABLE
[2020-04-10 22:41:44] Migrating the database...
[2020-04-10 22:41:51] EXCEPTION: lib/discourse.rb:90:in `exec': Failed to migrate database.
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

PG::UniqueViolation: ERROR:  could not create unique index "index_site_settings_on_name"
DETAIL:  Key (name)=(has_login_hint) is duplicated.
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/patches/db/pg.rb:110:in `exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/patches/db/pg.rb:110:in `async_exec'
/var/www/discourse/lib/migration/safe_migrate.rb:88:in `async_exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:92:in `block (2 levels) in execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies/interlock.rb:48:in `block in permit_concurrent_loads'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/concurrency/share_lock.rb:187:in `yield_shares'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies/interlock.rb:47:in `permit_concurrent_loads'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:91:in `block in execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:718:in `block (2 levels) in log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:717:in `block in log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:708:in `log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:90:in `execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/schema_statements.rb:443:in `add_index'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:890:in `block in method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:858:in `block in say_with_time'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:858:in `say_with_time'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:879:in `method_missing'
/var/www/discourse/db/migrate/20190325162154_make_site_settings_unique.rb:11:in `up'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:831:in `exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:9:in `block in exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in `exec_migration'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:812:in `block (2 levels) in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:811:in `block in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `with_connection'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:810:in `migrate'
/var/www/discourse/lib/migration/safe_migrate.rb:29:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1001:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1311:in `block in execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1362:in `block in ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/database_statements.rb:281:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/transaction.rb:280:in `block in within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/transaction.rb:278:in `within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/database_statements.rb:281:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1362:in `ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1310:in `execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1282:in `block in migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1281:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1281:in `migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1229:in `block in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1382:in `with_advisory_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1229:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1061:in `up'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1036:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/tasks/database_tasks.rb:238:in `migrate'
/var/www/discourse/lib/migration/safe_migrate.rb:52:in `migrate'
/var/www/discourse/lib/tasks/db.rake:72:in `block in <top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'

Caused by:
ActiveRecord::RecordNotUnique: PG::UniqueViolation: ERROR:  could not create unique index "index_site_settings_on_name"
DETAIL:  Key (name)=(has_login_hint) is duplicated.
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/patches/db/pg.rb:110:in `exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/patches/db/pg.rb:110:in `async_exec'
/var/www/discourse/lib/migration/safe_migrate.rb:88:in `async_exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:92:in `block (2 levels) in execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies/interlock.rb:48:in `block in permit_concurrent_loads'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/concurrency/share_lock.rb:187:in `yield_shares'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies/interlock.rb:47:in `permit_concurrent_loads'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:91:in `block in execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:718:in `block (2 levels) in log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:717:in `block in log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:708:in `log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:90:in `execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/schema_statements.rb:443:in `add_index'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:890:in `block in method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:858:in `block in say_with_time'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:858:in `say_with_time'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:879:in `method_missing'
/var/www/discourse/db/migrate/20190325162154_make_site_settings_unique.rb:11:in `up'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:831:in `exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:9:in `block in exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in `exec_migration'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:812:in `block (2 levels) in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:811:in `block in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `with_connection'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:810:in `migrate'
/var/www/discourse/lib/migration/safe_migrate.rb:29:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1001:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1311:in `block in execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1362:in `block in ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/database_statements.rb:281:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/transaction.rb:280:in `block in within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/transaction.rb:278:in `within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/database_statements.rb:281:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1362:in `ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1310:in `execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1282:in `block in migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1281:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1281:in `migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1229:in `block in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1382:in `with_advisory_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1229:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1061:in `up'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1036:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/tasks/database_tasks.rb:238:in `migrate'
/var/www/discourse/lib/migration/safe_migrate.rb:52:in `migrate'
/var/www/discourse/lib/tasks/db.rake:72:in `block in <top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'

Caused by:
PG::UniqueViolation: ERROR:  could not create unique index "index_site_settings_on_name"
DETAIL:  Key (name)=(has_login_hint) is duplicated.
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/patches/db/pg.rb:110:in `exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/patches/db/pg.rb:110:in `async_exec'
/var/www/discourse/lib/migration/safe_migrate.rb:88:in `async_exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:92:in `block (2 levels) in execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies/interlock.rb:48:in `block in permit_concurrent_loads'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/concurrency/share_lock.rb:187:in `yield_shares'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/dependencies/interlock.rb:47:in `permit_concurrent_loads'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:91:in `block in execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:718:in `block (2 levels) in log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:717:in `block in log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract_adapter.rb:708:in `log'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:90:in `execute'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/postgresql/schema_statements.rb:443:in `add_index'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:890:in `block in method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:858:in `block in say_with_time'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:858:in `say_with_time'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:879:in `method_missing'
/var/www/discourse/db/migrate/20190325162154_make_site_settings_unique.rb:11:in `up'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:831:in `exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:9:in `block in exec_migration'
/var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in `exec_migration'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:812:in `block (2 levels) in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:811:in `block in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `with_connection'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:810:in `migrate'
/var/www/discourse/lib/migration/safe_migrate.rb:29:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1001:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1311:in `block in execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1362:in `block in ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/database_statements.rb:281:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/transaction.rb:280:in `block in within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/transaction.rb:278:in `within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/connection_adapters/abstract/database_statements.rb:281:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1362:in `ddl_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1310:in `execute_migration_in_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1282:in `block in migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1281:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1281:in `migrate_without_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1229:in `block in migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1382:in `with_advisory_lock'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1229:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1061:in `up'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/migration.rb:1036:in `migrate'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/tasks/database_tasks.rb:238:in `migrate'
/var/www/discourse/lib/migration/safe_migrate.rb:52:in `migrate'
/var/www/discourse/lib/tasks/db.rake:72:in `block in <top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

[2020-04-10 22:41:51] lib/discourse.rb:100:in `execute_command'
lib/discourse.rb:90:in `exec'
lib/discourse.rb:40:in `execute_command'
/var/www/discourse/lib/backup_restore/database_restorer.rb:136:in `migrate_database'
/var/www/discourse/lib/backup_restore/database_restorer.rb:27:in `restore'
/var/www/discourse/lib/backup_restore/restorer.rb:49:in `run'
/var/www/discourse/lib/backup_restore.rb:184:in `block in start!'
/var/www/discourse/lib/backup_restore.rb:181:in `fork'
/var/www/discourse/lib/backup_restore.rb:181:in `start!'
/var/www/discourse/lib/backup_restore.rb:30:in `restore!'
/var/www/discourse/app/controllers/admin/backups_controller.rb:119:in `restore'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/abstract_controller/base.rb:196:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal/rendering.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:135:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/notifications.rb:180:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/notifications.rb:180:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.1/lib/active_record/railties/controller_runtime.rb:27:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/abstract_controller/base.rb:136:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionview-6.0.1/lib/action_view/rendering.rb:39:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/mini_profiler/profiling_methods.rb:104:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal.rb:191:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_controller/metal.rb:252:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:51:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:33:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/mapper.rb:18:in `block in <class:Constraints>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/mapper.rb:48:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/journey/router.rb:49:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/journey/router.rb:32:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/journey/router.rb:32:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:837:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/tempfile_reaper.rb:15:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/conditional_get.rb:38:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:318:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/session/abstract/id.rb:259:in `context'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/session/abstract/id.rb:253:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/cookies.rb:648:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:101:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/logster-2.8.0/lib/logster/middleware/reporter.rb:43:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/rack/logger.rb:38:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:18:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/method_override.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/executor.rb:14:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/sendfile.rb:111:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/host_authorization.rb:77:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.0.1/lib/mini_profiler/profiler.rb:312:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/message_bus-2.2.4/lib/message_bus/rack/middleware.rb:57:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:172:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/engine.rb:526:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.1/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/urlmap.rb:68:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/urlmap.rb:53:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.8/lib/rack/urlmap.rb:53:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.4/lib/unicorn/http_server.rb:605:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.4/lib/unicorn/http_server.rb:700:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.4/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.4/lib/unicorn/http_server.rb:144:in `start'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.4/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'
[2020-04-10 22:41:51] Trying to rollback...
[2020-04-10 22:41:51] Rolling back...
[2020-04-10 22:41:51] Cleaning stuff up...
[2020-04-10 22:41:51] Dropping functions from the discourse_functions schema...
[2020-04-10 22:41:51] Removing tmp '/var/www/discourse/tmp/restores/default/2020-04-10-224119' directory...
[2020-04-10 22:41:51] Unpausing sidekiq...
[2020-04-10 22:41:51] Disabling readonly mode...
[2020-04-10 22:41:51] Marking restore as finished...
[2020-04-10 22:41:51] Notifying 'mezbah' of the end of the restore...
[2020-04-10 22:42:01] Finished!

You have a corrupt index. You’ll need to fix it on the existing site and then create a new backup before you can restore. See Can't restore due to corrupt indexes (with some clues on how to deal with corrupt indexes). That was for a different table, so you’ll need to adjust those instructions significantly. If you don’t know much about databases, it’ll be hard

Do you have other backups besides this corrupted one?

Kindly take a screen shot of all your backups and upload that image in your reply?

This is your actual error

could not create unique index "index_site_settings_on_name"
DETAIL:  Key (name)=(has_login_hint) is duplicated.