Hi, So we have a bug[1] that was fixed in oslo.concurrency on master[2] and released as 5.0.1 and Zed is released with 5.0.1. The issue is present in stable/yoga as well. There we have oslo.concurrency upper constraint pinned to 4.5.0 [3]. 1) How can I backport [2] to the 4.5.x series of oslo.concurrency to release 4.5.2 with the fix? I don't see a branch that I could use for this. 2) If #1) is solved and 4.5.2 is released can I propose an upper constraint bump on stable/yoga from 4.5.0 to 4.5.2? 3) If #1) and #2) is done. Can I propose a minimum requirement bump in nova's requirements.txt from >= 4.5.0 to >= 4.5.2 on stable/yoga? Cheers, gibi [1] https://bugs.launchpad.net/nova/+bug/1988311 [2] https://review.opendev.org/c/openstack/oslo.concurrency/+/855714 [3] https://github.com/openstack/requirements/blob/e64217c9f9316675f57e14ff559bb4de90bc6637/upper-constraints.txt#L26