Main tag sharing same name and url with synonym

This happens to one specific tag, which have synonym and never been used.

The name and url of the main tag and synonym appeared to be the same.

Screenshot

  1. It won’t show up in the tags page and tag_groups page, but will show up in search and can be accessed by direct link

  2. Able to rename the main tag, but the synonym will changed as well.

    Screenshot

  3. When trying to delete the main tag:

    Sorry, an error has occurred.

  4. Remove synonym:

    429 error

  5. Delete synonym:

    500 error

Console

Message (3 copies reported)
ActiveRecord::RecordInvalid (Validation failed: Target tag is not allowed while synonyms exist) 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.3.1/lib/active_record/validations.rb:80:in `raise_validation_error'
Backtrace
activerecord-6.0.3.1/lib/active_record/validations.rb:80:in `raise_validation_error'
activerecord-6.0.3.1/lib/active_record/validations.rb:53:in `save!'
activerecord-6.0.3.1/lib/active_record/transactions.rb:318:in `block in save!'
activerecord-6.0.3.1/lib/active_record/transactions.rb:375:in `block in with_transaction_returning_status'
activerecord-6.0.3.1/lib/active_record/connection_adapters/abstract/database_statements.rb:278:in `transaction'
activerecord-6.0.3.1/lib/active_record/transactions.rb:212:in `transaction'
activerecord-6.0.3.1/lib/active_record/transactions.rb:366:in `with_transaction_returning_status'
activerecord-6.0.3.1/lib/active_record/transactions.rb:318:in `save!'
activerecord-6.0.3.1/lib/active_record/suppressor.rb:48:in `save!'
activerecord-6.0.3.1/lib/active_record/persistence.rb:635:in `block in update!'
activerecord-6.0.3.1/lib/active_record/transactions.rb:375:in `block in with_transaction_returning_status'
activerecord-6.0.3.1/lib/active_record/connection_adapters/abstract/database_statements.rb:280:in `block in transaction'
activerecord-6.0.3.1/lib/active_record/connection_adapters/abstract/transaction.rb:280:in `block in within_new_transaction'
activesupport-6.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:26:in `block (2 levels) in synchronize'
activesupport-6.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
activesupport-6.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
activesupport-6.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
activesupport-6.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
activerecord-6.0.3.1/lib/active_record/connection_adapters/abstract/transaction.rb:278:in `within_new_transaction'
activerecord-6.0.3.1/lib/active_record/connection_adapters/abstract/database_statements.rb:280:in `transaction'
activerecord-6.0.3.1/lib/active_record/transactions.rb:212:in `transaction'
activerecord-6.0.3.1/lib/active_record/transactions.rb:366:in `with_transaction_returning_status'
activerecord-6.0.3.1/lib/active_record/persistence.rb:633:in `update!'
/var/www/discourse/app/controllers/tags_controller.rb:317:in `destroy_synonym'
actionpack-6.0.3.1/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack-6.0.3.1/lib/abstract_controller/base.rb:195:in `process_action'
actionpack-6.0.3.1/lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack-6.0.3.1/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport-6.0.3.1/lib/active_support/callbacks.rb:135:in `run_callbacks'
actionpack-6.0.3.1/lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack-6.0.3.1/lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack-6.0.3.1/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
activesupport-6.0.3.1/lib/active_support/notifications.rb:180:in `block in instrument'
activesupport-6.0.3.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport-6.0.3.1/lib/active_support/notifications.rb:180:in `instrument'
actionpack-6.0.3.1/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack-6.0.3.1/lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
activerecord-6.0.3.1/lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack-6.0.3.1/lib/abstract_controller/base.rb:136:in `process'
actionview-6.0.3.1/lib/action_view/rendering.rb:39:in `process'
rack-mini-profiler-2.0.2/lib/mini_profiler/profiling_methods.rb:104:in `block in profile_method'
actionpack-6.0.3.1/lib/action_controller/metal.rb:190:in `dispatch'
actionpack-6.0.3.1/lib/action_controller/metal.rb:254:in `dispatch'
actionpack-6.0.3.1/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack-6.0.3.1/lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack-6.0.3.1/lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack-6.0.3.1/lib/action_dispatch/journey/router.rb:32:in `each'
actionpack-6.0.3.1/lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack-6.0.3.1/lib/action_dispatch/routing/route_set.rb:834:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
rack-2.2.2/lib/rack/tempfile_reaper.rb:15:in `call'
rack-2.2.2/lib/rack/conditional_get.rb:40:in `call'
rack-2.2.2/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'
rack-2.2.2/lib/rack/session/abstract/id.rb:266:in `context'
rack-2.2.2/lib/rack/session/abstract/id.rb:260:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/cookies.rb:648:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport-6.0.3.1/lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack-6.0.3.1/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
logster-2.9.0/lib/logster/middleware/reporter.rb:43:in `call'
railties-6.0.3.1/lib/rails/rack/logger.rb:37:in `call_app'
railties-6.0.3.1/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:19:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:22:in `call'
rack-2.2.2/lib/rack/method_override.rb:24:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/executor.rb:14:in `call'
rack-2.2.2/lib/rack/sendfile.rb:110:in `call'
actionpack-6.0.3.1/lib/action_dispatch/middleware/host_authorization.rb:76:in `call'
rack-mini-profiler-2.0.2/lib/mini_profiler/profiler.rb:312:in `call'
message_bus-3.3.1/lib/message_bus/rack/middleware.rb:61:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:176:in `call'
railties-6.0.3.1/lib/rails/engine.rb:527:in `call'
railties-6.0.3.1/lib/rails/railtie.rb:190:in `public_send'
railties-6.0.3.1/lib/rails/railtie.rb:190:in `method_missing'
rack-2.2.2/lib/rack/urlmap.rb:74:in `block in call'
rack-2.2.2/lib/rack/urlmap.rb:58:in `each'
rack-2.2.2/lib/rack/urlmap.rb:58:in `call'
unicorn-5.5.5/lib/unicorn/http_server.rb:605:in `process_client'
unicorn-5.5.5/lib/unicorn/http_server.rb:701:in `worker_loop'
unicorn-5.5.5/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
unicorn-5.5.5/lib/unicorn/http_server.rb:144:in `start'
unicorn-5.5.5/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>'

Discourse Version 2.6.0.beta1 (69803599a9)