Why does Leapp fails with "ModelViolationError: The value of "value" field must be one of "yes, prohibit-password, forced-commands-only, no" " Traceback ?

Issue

• Leapp preupgrade command fails with below traceback errors :

Traceback (most recent call last):
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 72, in _do_run
    actor_instance.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 289, in run
    self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/opensshconfigscanner/actor.py", line 28, in process
    readopensshconfig.scan_sshd(self.produce)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/opensshconfigscanner/libraries/readopensshconfig.py", line 102, in scan_sshd
    config = parse_config(output)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/opensshconfigscanner/libraries/readopensshconfig.py", line 42, in parse_config
    v = OpenSshPermitRootLogin(value=value, in_match=in_match)
  File "/usr/lib/python2.7/site-packages/leapp/models/__init__.py", line 90, in __init__
    getattr(defined_fields[field], init_method)(kwargs, field, self)
  File "/usr/lib/python2.7/site-packages/leapp/models/fields/__init__.py", line 111, in from_initialization
    self._validate_model_value(value=source_value, name=name)
  File "/usr/lib/python2.7/site-packages/leapp/models/fields/__init__.py", line 332, in _validate_model_value
    self._validate_choices(value, name)
  File "/usr/lib/python2.7/site-packages/leapp/models/fields/__init__.py", line 342, in _validate_choices
    'The value of "{name}" field must be one of "{values}"'.format(name=name, values=values))
ModelViolationError: The value of "value" field must be one of "yes, prohibit-password, forced-commands-only, no"