How to manually create Equipment card (without creating item #) in Business One v9

Hello All, Our Equipment cards are being created automatically from equipment that we sell. We also repair equipment that we didn't sell to our customers. When I try to manually create a new equipment card against a customers account # (from Master BP data), when I key in a s/n and move to next field I am being forced down the path to create an item # for it, which I don't want to do. I simply want to create cards for all/any equipment owned by the customer, brought in for repair.

Many thanks in advance!