When running online migrations -1 rows are matched

[Ryan M Belgrave]

When running online migrations for 2024.2 (Placement 12.0.0) the manage command reports -1 rows matched and always returns exit code 1

root@openstack-placement-1:~# /usr/bin/placement-manage db online_data_migrations --max 1
-1 rows matched query create_incomplete_consumers, -1 migrated
+-----------------------------+-------------+-----------+
| Migration | Total Found | Completed |
+-----------------------------+-------------+-----------+
| set_root_provider_ids | 0 | 0 |
| create_incomplete_consumers | -1 | -1 |
+-----------------------------+-------------+-----------+
root@openstack-placement-1:~# echo $?
1