[Pkg-libvirt-maintainers] Bug#745873: virt-clone onto LVM logical volume gives: ERROR Clone onto existing storage volume is not supported

[Mark Abrahams]

Package: virtinst
Version: 0.600.1-3+deb7u1

When I create an LVM logical volume and use virt-clone to clone an 
existing LV to the new LV, I get this error:

virt-clone --original source-vm --name dest-vm --file=/dev/vg1/dest-vm-lv
ERROR    Clone onto existing storage volume is not supported: 
'/dev/vg1/dest-vm-lv'

The LV was created with:
lvcreate -L 50G -n dest-vm-lv vg1

Regards
Mark Abrahams