Delete snapshots while pool is unavailable

i tried to garbage collect my testserver and worked my way trough from:
delete pool with missing drives->error: contains shares->delete shares-> error share contains snapshots->delete snapshots->error: ‘NoneType’ object has no attribute 'name’
i guess its related to some internal command trying to physically delete the snapshot, but nothing of that pool is available so it fails.

something like a “completely delete from internal database” button would be great