nova/releasenotes/notes/placement-aggregate-generation-9dad79fb0356fcc0.yaml

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---
features:
- |
Placement API microversion 1.19 enhances the payloads for the
`GET /resource_providers/{uuid}/aggregates` response and the
`PUT /resource_providers/{uuid}/aggregates` request and response to be
identical, and to include the ``resource_provider_generation``. As with
other generation-aware APIs, if the ``resource_provider_generation``
specified in the `PUT` request does not match the generation known by the
server, a 409 Conflict error is returned.