It's possible to move when source and destination storage are the same - is that intended?
root@pve:~# pct config 126|grep root
rootfs: local-lvm:vm-126-disk-0,size=2G
root@pve:~# pct stop 126; pct move-volume 126 rootfs local-lvm --delete
Logical volume "vm-126-disk-1" created.
Creating...
