Host registration fails with error NetworkException: HTTP error (400 - Bad Request)

Issue

• Host registration to Satellite fails with the below error.

  # subscription-manager register --org="ORG" --activationkey="Key" --force
  Network error. Please check the connection details, or see /var/log/rhsm/rhsm.log for more information.
  

• And /var/log/rhsm/rhsm.log log shows:

  2024-07-31 12:47:09,415 [DEBUG] subscription-manager:135231:MainThread @files.py:322 - Successfully read local syspurpose contents.
  2024-07-31 12:47:09,415 [DEBUG] subscription-manager:135231:MainThread @files.py:359 - Successfully read cached syspurpose contents.
  2024-07-31 12:47:09,428 [DEBUG] subscription-manager:135231:MainThread @dmiinfo.py:76 - Using dmidecode dump file: /dev/mem
  2024-07-31 12:47:09,499 [DEBUG] subscription-manager:135231:MainThread @cloud_facts.py:67 - Trying to detect public cloud
  2024-07-31 12:47:09,526 [DEBUG] subscription-manager:135231:MainThread @hwprobe.py:687 - Error during resolving IPv6 address of hostname: host.example.com, [Errno -5] No address associated with hostname
  2024-07-31 12:47:09,537 [DEBUG] subscription-manager:135231:MainThread @insights.py:68 - Unable to read insights machine_id file: /etc/insights-client/machine-id, error: [Errno 2] No such file or directory: '/etc/insights-client/machine-id'
  2024-07-31 12:47:09,537 [DEBUG] subscription-manager:135231:MainThread @insights.py:68 - Unable to read insights machine_id file: /etc/redhat-access-insights/machine-id, error: [Errno 2] No such file or directory: '/etc/redhat-access-insights/machine-id'
  2024-07-31 12:47:09,538 [DEBUG] subscription-manager:135231:MainThread @connection.py:524 - Loaded CA certificates from /etc/rhsm/ca/: redhat-uep.pem, katello-server-ca.pem, katello-default-ca.pem
  2024-07-31 12:47:09,538 [DEBUG] subscription-manager:135231:MainThread @connection.py:572 - Making request: POST /rhsm/consumers?owner=activation_keys=key_CAMPAGNE_HorsCampagne
  2024-07-31 12:47:10,149 [DEBUG] subscription-manager:135231:MainThread @connection.py:622 - Response: status=400, request="POST /rhsm/consumers?owner=activation_keys=key_CAMPAGNE_HorsCampagne"
  2024-07-31 12:47:10,150 [ERROR] subscription-manager:135231:MainThread @managercli.py:217 - Error during registration: HTTP error (400 - Bad Request)
  2024-07-31 12:47:10,150 [ERROR] subscription-manager:135231:MainThread @managercli.py:218 - HTTP error (400 - Bad Request)
  Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/subscription_manager/managercli.py", line 1389, in _do_command
  type=self.options.consumertype
  File "/usr/lib64/python2.7/site-packages/rhsmlib/services/register.py", line 93, in register
  jwt_token=jwt_token
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 1063, in registerConsumer
  return self.conn.request_post(url, params, headers=headers)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 733, in request_post
  return self._request("POST", method, params, headers=headers)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 756, in _request
  info=info, headers=headers)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 631, in _request
  self.validateResponse(result, request_type, handler)
  File "/usr/lib64/python2.7/site-packages/rhsm/connection.py", line 717, in validateResponse
  raise NetworkException(response['status'])
  NetworkException: HTTP error (400 - Bad Request)