The Neutron API is setting the router ID in the "external_ids" field of the "Logical_Router_Port" registers, under the key OVN_ROUTER_NAME_EXT_ID_KEY = 'neutron:router_name'.

It is expected to have the router name, that is:

f'neutron-{router_id}'

It is needed to change the Neutron API and create a maintenance method to fix the existing registers.

U/S launchpad bug: https://bugs.launchpad.net/neutron/+bug/2055045

U/S fix, master (2025.2): https://review.opendev.org/c/openstack/neutron/+/940445

NOTE: this fix is needed for https://issues.redhat.com/browse/OSPRH-20928