Hi, I wanted to rollback a group snapshot on Ubuntu 24.04 (rbd client version 19.2.1), the Ceph cluster version is 19.2.3. The client fails with "invalid argument": controller02:~# rbd --id <user> group snap rollback --pool images --group test-servers --snap 20260430_start Rolling back to group snapshot: 0% complete...failed. rbd: rollback group to snapshot failed: (22) Invalid argument controller02:~# ceph -v ceph version 19.2.1 (9efac4a81335940925dd17dbf407bfd6d3860d28) squid (stable) But running the same command (just as admin not as <user>) on a Ceph node works: ceph03:~ # rbd group snap rollback --pool images --group test-servers --snap 20260430_start Rolling back to group snapshot: 100% complete...done. ceph03:~ # ceph -v ceph version 16.2.13-66-g54799ee0666 (54799ee06669271880ee5fc715f99202002aa371) pacific (stable) What seems to be the issue here is that I removed an image from the group snapshot. I wonder if it could be this bug [0] which is supposed to be fixed in 19.2.0 according to the "Released In" field of the Squid backport tracker [1]. This seems a little inconsistent to me, could someone please clarify? Thanks! Eugen [0] https://tracker.ceph.com/issues/66300 [1] https://tracker.ceph.com/issues/66589 -- Eugen Block NDE Netzdesign und -entwicklung AG voice: +49 40 5595175 Postfach 61 03 15 e-mail: eblock@nde.ag D-22423 Hamburg Vorstand: Jens-U. Mozdzen Aufsichtsratsvorsitzende: Angelika Torlée-Mozdzen Sitz und Registergericht: Hamburg, HRB 90934 USt-IdNr: DE 814 013 983