当我尝试运行Django服务器时，遇到以下问题

Question

我正在尝试运行Django服务器，并且遇到以下问题。因此，我在Django上还很陌生，然后让我知道是否需要任何其他信息。这段代码对我来说真的很复杂，我要挑战自己同时运行多个应用程序。

    Environment:
    Request Method: GET
    Request URL: http://127.0.0.1:8000/

    Django Version: 2.2.2
    Python Version: 3.6.4
    Installed Applications:
    ['registration',
     'mailqueue',
     'el_pagination',
     'social_django',
     'django_inlinecss',
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'main',
     'users']
    Installed Middleware:
    ['django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.locale.LocaleMiddleware',
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'social_django.middleware.SocialAuthExceptionMiddleware']

Traceback:
    File "/home/rnominato/anaconda3/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
      34.             response = get_response(request)
    File "/home/rnominato/anaconda3/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
      115.                 response = self.process_exception_by_middleware(e, request)
    File "/home/rnominato/anaconda3/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
      113.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)
    File "/home/rnominato/PycharmProjects/Liben_Feb_2020/main/decorators.py" in wrap
      20.         mode = Mode.objects.get(id=1)
    File "/home/rnominato/anaconda3/lib/python3.6/site-packages/django/db/models/manager.py" in manager_method
      82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)
    File "/home/rnominato/anaconda3/lib/python3.6/site-packages/django/db/models/query.py" in get
      408.                 self.model._meta.object_name
    Exception Type: DoesNotExist at /
    Exception Value: Mode matching query does not exist.