NO.1：
You have 15 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run ‘python manage.py migrate‘ to apply them.
解决：执行python manage.py migrate 同步更改数据库表或字段
原文：https://www.cnblogs.com/star-south/p/10776837.html