Virtual disk migration on Proxmox:beaubourg from beaubourg-ssd to Ceph fails with this kind of error:
```can't deactivate LV '/dev/ssd/vm-107-disk-0': Logical volume ssd/vm-107-disk-0 is used by another device.
volume deactivation failed: beaubourg-ssd:vm-107-disk-0 at /usr/share/perl5/PVE/Storage.pm line 1042.```
It has been observed with vm-102-disk-0 and vm-107-disk0 so far.