Seconde time a that lxd snap 3.23 full my root partition!

Hi,
I am using zfs has the backend,
I have created 2 new pool and then 2 new volume

lxc storage create bkp_pool zfs source=tank/bkp_pool
lxc storage create img_pool zfs source=tank/img_pool
lxc storage volume create bkp_pool bkp_vol
lxc storage volume create img_pool img_vol

lxc config set storage.backups_volume bkp_pool/bkp_vol
Error: Storage volume “bkp_pool/bkp_vol” isn’t empty

lxc config set storage.images_volume img_pool/img_vol
Error: Storage volume “img_pool/img_vol” isn’t empty

Is this a new bug or am I missing something.

I could use type dir to a zfs volume, but why should I ?