Sounds like some kind of database 'rat's nest' where something gets out of sync or something that should have been removed wasn't. These things are pesky but usually not dire.
Your best bet is to contact your VAR and have them manage the issue through SolidWorks. Typically, they will want you to send some export files of your db that they can study, then they'll create custom queries you can run to fix the problem. I've been through the routine and it was a little daunting at first, but it worked out well in the end. Be sure to do exactly what they tell you...
Best of luck.