Open Stack

Hi,

I am currently trying to backport the fix for
https://launchpad.net/bugs/1254246 to stable/havana. The current state of that
is here: https://review.openstack.org/#/c/68929/

However, the fix requires a database migration to be applied (to add a unique
constraint to the agents table). And the current fix linked above will AFAIK
break havana->icehouse migrations. So I wonder what would be the correct way to
do backport database migrations in neutron using alembic? Is there even a
correct way, or are backports of database migrations a no go?

-- 
regards,
    Ralf