I had errors in my root filesystem (btrfs) so I recreated it from a backup but now, snapper doesn't work anymore:

# /usr/bin/snapper -v -v -v -v create --description test
IO Error.
# snapper -v  delete-config 
Deleting config failed (deleting snapshot failed).
# snapper create-config /
Creating config failed (subvolume already covered).
# snapper -c root create-config /
Creating config failed (subvolume already covered).
# snapper list
Type   | # | Pre # | Date | User | Cleanup | Description | Userdata
-------+---+-------+------+------+---------+-------------+---------
single | 0 |       |      | root |         | current     |         

I also tries to reinstall/remove and install the package snapper but without any luck.

Any ideas how I can make snapper work again?

openSUSE 12.3 with kernel 3.7.10-1.1-desktop.