Publishing a new version of a Content View in Red Hat Satellite 6 fails with an error duplicate key value violates unique constraint "core_repositorycontent_repository_id_content_id_df902e11_uniq"

Issue

• Publishing a new version of a Content View fails with the following traceback:

  Jan 24 15:39:23 nodename pulpcore-worker-6: pulp [7ee38a97-151c-47a7-8739-0ff4e44f2973]: pulpcore.tasking.pulpcore_worker:INFO: Starting task cd1693d0-8a15-4b95-a6f6-c431fb376865
  Jan 24 15:39:23 nodename pulpcore-api: pulp [7ee38a97-151c-47a7-8739-0ff4e44f2973]:  - - [24/Jan/2022:20:39:23 +0000] "POST /pulp/api/v3/repositories/rpm/rpm/376c26da-1fd7-41ef-b33e-071908c17d1f/modify/ HTTP/1.1" 202 67 "-" "OpenAPI-Generator/3.13.3/ruby"
  Jan 24 15:39:23 nodename pulpcore-worker-8: pulp [7ee38a97-151c-47a7-8739-0ff4e44f2973]: pulpcore.tasking.pulpcore_worker:INFO: Task 3f572446-f9c4-440b-94cb-3bc4f39db952 failed (duplicate key value violates unique constraint "core_repositorycontent_repository_id_content_id_df902e11_uniq"
  Jan 24 15:39:23 nodename pulpcore-worker-8: DETAIL:  Key (repository_id, content_id, version_removed_id)=(efb0eb39-f02f-4493-a1af-bf6fb2b462de, 2b6f6ef7-3382-4b7c-a8a1-f088db1bb581, 61dfdd1f-46d1-49b7-89bc-44adb55769ec) already exists.
  

Optionally, an attempt to delete a CV or its version fails with the same error.