Как импортировать поле формы?

Столкнулся с проблемой, что не могу импортировать поле из одной формы в другую форму.

форма 1 (из которой импортирую):

from django import forms
class settingForm(forms.Form):
    start_time = forms.CharField(label='', max_length = 9, required = False)
    end_time = forms.CharField(label='', max_length = 9, required = False)

форма 2 (в которую импортирую):

from django import forms
from progress.forms.settings.form_setting import settingForm
class editForm(forms.Form):
    start_time = settingForm(forms.Form).age_min

В результате выдаёт ошибку:

Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\threading.py", line 926, in _bootstrap_inner
    self.run()
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\core\management\commands\runserver.py", line 118, in inner_run
    self.check(display_num_errors=True)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\core\management\base.py", line 396, in check
    databases=databases,
  File "C:\Users\user\wwwkaba\lib\site-packages\django\core\checks\registry.py", line 70, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "C:\Users\user\wwwkaba\lib\site-packages\django\urls\resolvers.py", line 408, in check
    for pattern in self.url_patterns:
  File "C:\Users\user\wwwkaba\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\urls\resolvers.py", line 589, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\user\wwwkaba\lib\site-packages\django\urls\resolvers.py", line 582, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\user\Google Диск\bf\bf\urls.py", line 58, in <module>
    path('progress/', include('progress.urls')),
  File "C:\Users\user\wwwkaba\lib\site-packages\django\urls\conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\user\Google Диск\bf\progress\urls.py", line 7, in <module>
    from progress.views.camp_details import camp_details, edit
  File "C:\Users\user\Google Диск\bf\progress\views\camp_details\edit.py", line 8, in <module>
    from progress.forms.camp_details.form_edit import editForm
  File "C:\Users\user\Google Диск\bf\progress\forms\camp_details\form_edit.py", line 9, in <module>
    class editForm(forms.Form):
  File "C:\Users\user\Google Диск\bf\progress\forms\camp_details\form_edit.py", line 11, in editForm
    start_time = settingForm(forms.Form).age_min
AttributeError: 'settingForm' object has no attribute 'age_min'

Заранее благодарю за помощь.