known issue in 5.1.9 - upgrade to the current version, or downgrade sbfiledb.dll to 5.1.8 (unsupported though!)
Thanks Safeboot will it just fix it though if i upgrade or do i need to roll back to a backup where the group hasnt been removed then upgrade?
The client has rolled back to a time where the group is still there ( no new machines added since it was only a couple days ago)
I'll try to persuade them to upgrade at some point soon to make sure this doesnt happen again.
its just over sensitivity in 5.1.9 - nothing bad happened to your DB.