Comment 4 for bug 1816034

Maybe that won't work because then old instance allocations won't be reported to placement which would re-introduce bug 1724589:

(8:54:14 AM) belmoreira: mriedem: we are fixing this in our instances_extra because we will need to recreate the allocations/RP. To make sure RP will not not change uuid in a sharded nova-compute setup with ironic
(8:54:36 AM) belmoreira: otherwise allocations will not be recreated
(8:54:51 AM) mriedem: you mean for old instances
(8:54:58 AM) mriedem: otherwise the scheduler would create the allocations
(8:55:14 AM) belmoreira: yes, for old instances