Comment 1 for bug 1857306

osapi_compute_unique_server_name_scope = True is not a valid choice for that option:

https://docs.openstack.org/nova/stein/configuration/config.html#DEFAULT.osapi_compute_unique_server_name_scope

Valid Values: ‘’, project, global

What is the actual value you had set?

I'm not saying this is an invalid bug, and it's likely easy to recreate (I don't think this option is set in many deployments), I'm just wondering how you have things configured specifically to recreate it with a functional test in-tree so we can be assured of the fix.