ValueError: u'token' is not in list in two_factor.views.utils in process_step about django-two-factor-auth HOT 12 CLOSED

AttributeError: 'bool' object has no attribute 'otp_device'
Stacktrace (most recent call last):

  File "django/core/handlers/base.py", line 112, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "django/views/decorators/debug.py", line 75, in sensitive_post_parameters_wrapper
    return view(request, *args, **kwargs)
  File "django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)
  File "django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "django/views/decorators/cache.py", line 52, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)
  File "django/contrib/formtools/wizard/views.py", line 236, in dispatch
    response = super(WizardView, self).dispatch(request, *args, **kwargs)
  File "django/views/generic/base.py", line 87, in dispatch
    return handler(request, *args, **kwargs)
  File "two_factor/views/core.py", line 93, in post
    return super(LoginView, self).post(*args, **kwargs)
  File "two_factor/views/utils.py", line 84, in post
    return super(IdempotentSessionWizardView, self).post(*args, **kwargs)
  File "django/contrib/formtools/wizard/views.py", line 289, in post
    if form.is_valid():
  File "django/forms/forms.py", line 129, in is_valid
    return self.is_bound and not bool(self.errors)
  File "django/forms/forms.py", line 121, in errors
    self.full_clean()
  File "django/forms/forms.py", line 274, in full_clean
    self._clean_form()
  File "django/forms/forms.py", line 300, in _clean_form
    self.cleaned_data = self.clean()
  File "two_factor/forms.py", line 152, in clean
    self.clean_otp(self.user)
  File "django_otp/forms.py", line 61, in clean_otp
    user.otp_device = None

ValueError: u'token' is not in list
Stacktrace (most recent call last):

  File "django/core/handlers/base.py", line 112, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "django/views/decorators/debug.py", line 75, in sensitive_post_parameters_wrapper
    return view(request, *args, **kwargs)
  File "django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)
  File "django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "django/views/decorators/cache.py", line 52, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)
  File "django/contrib/formtools/wizard/views.py", line 236, in dispatch
    response = super(WizardView, self).dispatch(request, *args, **kwargs)
  File "django/views/generic/base.py", line 87, in dispatch
    return handler(request, *args, **kwargs)
  File "build/bdist.linux-x86_64/egg/two_factor/views/core.py", line 93, in post
    return super(LoginView, self).post(*args, **kwargs)
  File "build/bdist.linux-x86_64/egg/two_factor/views/utils.py", line 84, in post
    return super(IdempotentSessionWizardView, self).post(*args, **kwargs)
  File "django/contrib/formtools/wizard/views.py", line 291, in post
    self.storage.set_step_data(self.steps.current, self.process_step(form))
  File "build/bdist.linux-x86_64/egg/two_factor/views/utils.py", line 106, in process_step
    key = keys.index(step) + 1

<img src="/secret/?{% now "c" %}" />

def get(self, request, *args, **kwargs):
    """
    This method handles GET requests.

    If a GET request reaches this point, the wizard assumes that the user
    just starts at the first step or wants to restart the process.
    The data of the wizard will be resetted before rendering the first step.
    """
    self.storage.reset()

    # reset the current step to the first step.
    self.storage.current_step = self.steps.first
    return self.render(self.get_form())