This is being handled with a backend-specific condition in the 247 migration:
https://review.openstack.org/#/c/69047/45/nova/db/sqlalchemy/migrate_repo/versions/247_nullable_mismatch.py
This is being handled with a backend-specific condition in the 247 migration:
https:/ /review. openstack. org/#/c/ 69047/45/ nova/db/ sqlalchemy/ migrate_ repo/versions/ 247_nullable_ mismatch. py