Django错误：Migration admin.0001_initial is applied before its dependency users.0001_initial on databas

Django错误：Migration admin.0001_initial is applied before its dependency users.0001_initial on databas

完整错误提示：

django.db.migrations.exceptions.InconsistentMigrationHistory: Migration admin.0001_initial is applied before its dependency users.0001_initial on database 'default'.

背景：
在执行makemigrations，migrate后报错。
原因：因为之前有迁移过数据库，使用了django内部自带的admin 认证管理，新用户模型建立之后没有找到user admin依赖，因此，先注释掉原先的admin认证模型，然后执行迁移，让新的用户模型和admin产生依赖即可

解决方法：

1.先注释掉setting.py中 admin app

INSTALLED_APPS = [
    #'django.contrib.admin',
]

urls.py中的路由

urlpatterns = [
    path('', include('registers.urls')),
    # path('admin/', admin.site.urls),
]

2. 执行migrate

python manage.py migrate

3. 取消注释

INSTALLED_APPS = [
    'django.contrib.admin',
]

urlpatterns = [
    path('', include('registers.urls')),
    path('admin/', admin.site.urls),
]