我的项目中有一个自定义用户模型。我想通过删除数据库中的所有表并删除迁移来删除它并返回默认用户模型。在此之后，我尝试运行python manage.py makemigrations命令，但它写道：
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
utility.execute()
File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/core/management/__init__.py", line 347, in execute
django.setup()
File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/apps/registry.py", line 89, in populate
app_config = AppConfig.create(entry)
File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/apps/config.py", line 116, in create
mod = import_module(mod_path)
File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, …