This BZ is related to BZ#2094427. The output of this BZ was https://access.redhat.com/solutions/6963127, when we recommend to manually create the RBAC model indexes if needed.

That collides with https://review.opendev.org/c/openstack/neutron/+/810072/, that is available in upstream Yoga version (and in OSP18/Zed).

To avoid an issue during the DB migration, we need to make this migration conditional and check if the index exists before creating it.