Merge Requests 500

We just upgrade to 12.9.0 and we are getting a 500 on the merge requests page

1. Started GET "/group/project/-/merge_requests/367" for 10.6.1.18 at 2020-03-24 12:52:23 -0700
2. Processing by Projects::MergeRequestsController#show as HTML
3. Parameters: {"namespace_id"=>"group", "project_id"=>"project", "id"=>"367"}
4. Started PATCH "/api/v4/jobs/6780/trace" for 10.9.1.76 at 2020-03-24 12:52:24 -0700
5. Completed 500 Internal Server Error in 704ms (ActiveRecord: 76.8ms | Elasticsearch: 0.0ms | Allocations: 164687)
6. ActionView::Template::Error (MergeRequestNoteableEntity missing attribute `state' on #<MergeRequest:0x00007f4048ff85b8>):
7. 4: - tab_data = local_assigns.fetch(:data, nil)
8. 5:
9. 6: .tab-pane{ id: tab_id, class: tab_class, style: ("display: block" if params[:tab] == tab_name), data: tab_data }
10. 7: = yield
11. app/serializers/base_serializer.rb:16:in `represent'
12. app/serializers/merge_request_serializer.rb:23:in `represent'
13. app/helpers/issuables_helper.rb:87:in `serialize_issuable'
14. app/views/projects/merge_requests/show.html.haml:66
15. app/views/projects/merge_requests/tabs/_pane.html.haml:7
16. app/views/projects/merge_requests/show.html.haml:54
17. app/controllers/application_controller.rb:125:in `render'
18. app/controllers/projects/merge_requests_controller.rb:70:in `block (2 levels) in show'
19. app/controllers/projects/merge_requests_controller.rb:51:in `show'
20. app/controllers/application_controller.rb:560:in `block in allow_gitaly_ref_name_caching'
21. lib/gitlab/gitaly_client.rb:354:in `allow_ref_name_caching'
22. app/controllers/application_controller.rb:559:in `allow_gitaly_ref_name_caching'
23. app/controllers/application_controller.rb:479:in `set_current_admin'
24. lib/gitlab/session.rb:11:in `with_session'
25. app/controllers/application_controller.rb:470:in `set_session_storage'
26. lib/gitlab/i18n.rb:55:in `with_locale'
27. lib/gitlab/i18n.rb:61:in `with_user_locale'
28. app/controllers/application_controller.rb:464:in `set_locale'
29. lib/gitlab/error_tracking.rb:34:in `with_context'
30. app/controllers/application_controller.rb:555:in `sentry_context'
31. lib/gitlab/application_context.rb:46:in `block in use'
32. lib/gitlab/application_context.rb:46:in `use'
33. lib/gitlab/application_context.rb:19:in `with_context'
34. app/controllers/application_controller.rb:455:in `set_current_context'
35. lib/gitlab/request_profiler/middleware.rb:17:in `call'
36. lib/gitlab/middleware/go.rb:20:in `call'
37. lib/gitlab/etag_caching/middleware.rb:13:in `call'
38. lib/gitlab/middleware/multipart.rb:121:in `call'
39. lib/gitlab/middleware/read_only/controller.rb:53:in `call'
40. lib/gitlab/middleware/read_only.rb:18:in `call'
41. lib/gitlab/middleware/basic_health_check.rb:25:in `call'
42. lib/gitlab/middleware/request_context.rb:23:in `call'
43. config/initializers/fix_local_cache_middleware.rb:9:in `call'
44. lib/gitlab/metrics/requests_rack_middleware.rb:49:in `call'
45. lib/gitlab/middleware/release_env.rb:12:in `call'

Any Ideas?

Ok I did a reboot on the server and now it works.
Seems like something didn’t get restarted.