Bulk Delete Devices in 7.0.5

[Duckfather]

Hi all

For some reason, my new installation of 7.0.5 has duplicated many of my servers while importing from HP SIM 7. It's imported the servers correctly, then for some reason has duplicated most of them just as a serial number with no other information associated.

(I think this was because of an initial configuration error I made with discovery credentials)

Is there any way that I can bulk delete these spurious devices, either from a command line or otherwise? If I have to do this on a per device basis it will take me a week to remove them all!

Cheers in advance

Andy