When dropping in washers from my toolbox, I am getting duplicate entries in my BOM. What's happening is that I'm making a revision to an older assembly which uses configuration FW 0.138. When I go to add another #8 washer, it calls the configuration "Preferred Narrow FW 0.138" and tells me that my part number M11693 already exists but under a different config and do I want to save this part. Upon saying yes, it creates the new config with "Preferred Narrow". This is being done to all our washers and we now have several duplicated.