Btrfs Received UUID set after move/copy to other storage pool or other host

1

Hi there,

Not sure if it’s a bug or just as designed, but after moving/copying a container residing on a btrfs pool to another storage pool or host (on btrfs too) , it leaves the received_uud set, which is wrong according btrfs itself:

sudo btrfs sub show /storage/root/incus/containers/wifi
WARNING: the subvolume is read-write and has received_uuid set,
         don't use it for incremental send. Please see section
         'SUBVOLUME FLAGS' in manual page btrfs-subvolume for
         further information.
incus/containers/wifi
        Name:                   wifi
        UUID:                   77a79dc7-ae0a-b64a-bcd0-3c05c4493b25
        Parent UUID:            -
        Received UUID:          280a133d-ff1a-1b4f-9b9a-8651a912e523
        Creation time:          2026-06-24 13:35:32 +0200
        Subvolume ID:           4174
        Generation:             1099881
        Gen at creation:        1099875
        Parent ID:              4006
        Top level ID:           4006
        Flags:                  -
        Send transid:           0
        Send time:              2026-06-24 13:35:32 +0200
        Receive transid:        1099880
        Receive time:           2026-06-24 13:35:39 +0200
        Snapshot(s):
        Quota group:            n/a

So shouldn’t incus clear that uuid after moving/copying? Now I have to remember doing it myself or my btrfs backups will fail/complain

2

Can confirm that, moved a volume between two storages (two different NVMe’s):

❯ sudo btrfs subvolume show /var/lib/root-incus/custom/immich_vol-library/
WARNING: the subvolume is read-write and has received_uuid set,
	 don't use it for incremental send. Please see section
	 'SUBVOLUME FLAGS' in manual page btrfs-subvolume for
	 further information.

Also seen that (different bug):

❯ incus storage create root btrfs source=/var/lib/incusroot/
Error: Only allowed source path under "/var/lib/incus" is "/var/lib/incus/storage-pools/root"

~/projects/incus-compose main* ≡
❯ incus storage create root btrfs source=/var/lib/root-incus/
Storage pool root created
3