Subsription-manager returns "Remote server error." on hosts registered to Red Hat Capsule.

Issue

• Trying to execute subscription-manager on hosts registered to Red Hat Capsule returns

  [ERROR] subscription-manager:315633:MainThread @managercli.py:216 - Server error attempting a DELETE to /rhsm/consumers/e895c0da-adb2-43ff-a44d-cde25f72125a returned status 404
  Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/subscription_manager/managercli.py", line 1313, in _do_command
  unregister.UnregisterService(self.cp).unregister()
  File "/usr/lib64/python2.7/site-packages/rhsmlib/services/unregister.py", line 54, in unregister
  self.uep.unregisterConsumer(self.identity.uuid)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 1283, in unregisterConsumer
  return self.conn.request_delete(method)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 738, in request_delete
  return self._request("DELETE", method, params, headers=headers)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 752, in _request
  info=info, headers=headers)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 627, in _request
  self.validateResponse(result, request_type, handler)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 695, in validateResponse
  handler=handler)
  RemoteServerException: Server error attempting a DELETE to /rhsm/consumers/e895c0da-adb2-43ff-a44d-cde25f72125a returned status 404