我正在通过 Memberful 在论坛上使用 DiscourseConnect，并且我正在尝试追踪一个错误，该错误可能是 bug，或者有人可以就解决方法提供建议。
用户名似乎是“名字 + 递增数字”，但是用户已存在，因此我们在错误日志中看到以下消息。
我不确定同步本身是如何触发的，以便重现，但我猜想某个计划任务在某处调用了 /admin/users/sync_sso。
我在除夕安装了最新可用更新，并重建了应用程序，今天的错误日志如下所示：
版本：2.8.13
消息（报告了 33 份副本）
ActiveRecord::RecordNotUnique (PG::UniqueViolation: ERROR: duplicate key value violates unique constraint \"index_users_on_username\"
DETAIL: Key (username)=(REDACTED) already exists.
)
app/models/discourse_connect.rb:253:in `block in match_email_or_create_user'
lib/distributed_mutex.rb:33:in `block in synchronize'
lib/distributed_mutex.rb:29:in `synchronize'
lib/distributed_mutex.rb:29:in `synchronize'
lib/distributed_mutex.rb:14:in `synchronize'
app/models/discourse_connect.rb:239:in `match_email_or_create_user'
app/models/discourse_connect.rb:121:in `lookup_or_create_user_unsafe'
app/models/discourse_connect.rb:109:in `block in lookup_or_create_user'
lib/distributed_mutex.rb:33:in `block in synchronize'
lib/distributed_mutex.rb:29:in `synchronize'
lib/distributed_mutex.rb:29:in `synchronize'
lib/distributed_mutex.rb:14:in `synchronize'
app/models/discourse_connect.rb:108:in `lookup_or_create_user'
app/controllers/admin/users_controller.rb:471:in `sync_sso'
app/controllers/application_controller.rb:387:in `block in with_resolved_locale'
app/controllers/application_controller.rb:387:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:71:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:361:in `call'
config/initializers/100-quiet_logger.rb:23:in `call'
config/initializers/100-silence_logger.rb:31:in `call'
lib/middleware/enforce_hostname.rb:23:in `call'
lib/middleware/request_tracker.rb:198:in `call'
回溯
rack-mini-profiler (2.3.3) lib/patches/db/pg.rb:69:in `exec_params'
rack-mini-profiler (2.3.3) lib/patches/db/pg.rb:69:in `exec_params'
activerecord (6.1.6.1) lib/active_record/connection_adapters/postgresql_adapter.rb:672:in `block (2 levels) in exec_no_cache'
activesupport (6.1.6.1) lib/active_support/dependencies/interlock.rb:48:in `block in permit_concurrent_loads'
activesupport (6.1.6.1) lib/active_support/concurrency/share_lock.rb:187:in `yield_shares'
activesupport (6.1.6.1) lib/active_support/dependencies/interlock.rb:47:in `permit_concurrent_loads'
activerecord (6.1.6.1) lib/active_record/connection_adapters/postgresql_adapter.rb:671:in `block in exec_no_cache'
activerecord (6.1.6.1) lib/active_record/connection_adapters/abstract_adapter.rb:696:in `block (2 levels) in log'
activesupport (6.1.6.1) lib/active_support/concurrency/load_interlock_aware_monitor.rb:26:in `block (2 levels) in synchronize'
activesupport (6.1.6.1) lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
环境（已缩减）
| REQUEST_URI | /admin/users/sync_sso |
|---|---|
| REQUEST_METHOD | POST |
| HTTP_USER_AGENT | http.rb/5.1.0 |