I addedd on Storage.pm:
sub volume_is_base {
my ($cfg, $volid) = @_;
my ($sid, $volname) = parse_volume_id($volid, 1);
return 0 if !$sid;
if (my $scfg = $cfg->{ids}->{$sid}) {
my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
my ($vtype, $name, $vmid...