django 同步数据库失效怎么解决

django Version: 2.2.3 更新了models.py后，执行

root@:collection:/code# python manage.py makemigrations
No changes detected

root@:collection:/code# python manage.py migrate
Operations to perform:
  Apply all migrations: account, admin, auth, authtoken, sessions, sites, socialaccount, template
Running migrations:
  No migrations to apply.

看上去是检测不到models.py有变化一样，有什么解决办法吗，很头疼的问题😭