Uninstalling clients that don't exist anymore

Hi.

So right now, I'm working on clearing out a bunch of clients from my Symantec Ghost Console since there are a bunch of clients that aren't even used anymoreand I've been getting warnings that I'm running out of licenses. However, a lot of these clients don't even exist anymore.

Is there any way I can remove those clients from the Ghost Console so I can free up some licenses for new machines coming in?