Cannot enable repository with Error Mesage: ERROR: raise DuplicateResource

Issue

• When trying to enable a specific repository, I'm receiving the following error message which can be observed
  in /var/log/messages:

Mar 17 13:12:36 hostname pulp: pulp.server.webservices.middleware.exception:ERROR:   File "/usr/lib/python2.7/site-packages/pulp/server/managers/repo/cud.py", line 77, in create_repo
Mar 17 13:12:36 hostname pulp: pulp.server.webservices.middleware.exception:ERROR:     raise DuplicateResource(repo_id)
Mar 17 13:12:36 hostname pulp: pulp.server.webservices.middleware.exception:ERROR: DuplicateResource: Duplicate resource: Default_Organization-Red_Hat_Enterprise_Linux_Server-Red_Hat_Enterprise_Linux_7_Server_-_Extras_RPMs_x86_64