老师，在个人中心，我收藏的课程，报这个错

Internal Server Error: /users/myfav/course/

Traceback (most recent call last):

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\core\handlers\base.py", line 149, in get_response

    response = self.process_exception_by_middleware(e, request)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\core\handlers\base.py", line 147, in get_response

    response = wrapped_callback(request, *callback_args, **callback_kwargs)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\views\generic\base.py", line 68, in view

    return self.dispatch(request, *args, **kwargs)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\utils\decorators.py", line 67, in _wrapper

    return bound_func(*args, **kwargs)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\contrib\auth\decorators.py", line 23, in _wrapped_view

    return view_func(request, *args, **kwargs)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\utils\decorators.py", line 63, in bound_func

    return func.__get__(self, type(self))(*args2, **kwargs2)

  File "C:\Users\1\PycharmProjects\EduOnline\apps\utils\mixin_util.py", line 13, in dispatch

    return super(LoginRequiredMixin, self).dispatch(request,*args,**kwargs)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\views\generic\base.py", line 88, in dispatch

    return handler(request, *args, **kwargs)

  File "C:\Users\1\PycharmProjects\EduOnline\apps\users\views.py", line 298, in get

    course = Course.objects.get(id=course_id)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\db\models\manager.py", line 122, in manager_method

    return getattr(self.get_queryset(), name)(*args, **kwargs)

  File "C:\Users\1\Envs\eduonline\lib\site-packages\django\db\models\query.py", line 387, in get

    self.model._meta.object_name

courses.models.DoesNotExist: Course matching query does not exist.