Deleting repository fails with "Repository cannot be deleted since it has already been included in a published Content View" in Red Hat Satellite 6

Issue

• Unable to delete repository, as it fails with below error:

  Repository cannot be deleted since it has already been included in a published Content View. Please delete all Content View versions containing this repository before attempting to delete it.
  

• Deleting repository using hammer command fails with below error:

  # hammer repository delete --id 226
  Could not delete the Repository:
    Repository cannot be deleted since it has already been included in a published Content View. Please delete all Content View versions containing this repository before attempting to delete it.