Rollback All Migrations for an App If you want to roll back all migrations for an app (resetting it to an unmigrated state), specify zero as the migration name:

python manage.py migrate app_name zero In Django, you can execute custom Python code during a migration by using the RunPython operation. This allows you to write Python code that runs as part of the migration process, such as data migrations or other custom logic.

Rolling back migrations If you want to roll back all migrations for an app (reset it to an unmigrated state), specify zero as the migration name:

python manage.py migrate app_name zero

Data Loss: Rolling back migrations might result in data loss if the migration involves deleting fields, tables, or data.

Irreversible Migrations: If a migration is marked as irreversible (e.g., a RunPython operation without a reverse function), Django will raise an error when you attempt to roll it back.

Backup: Always back up your database before rolling back migrations, especially in production environments.