Removing Quantity on a canceled BO


There are a lot of blanket orders in my system from before I started in my position, that are canceled or expired but have open quantities on them. This causes issues where new PO's and BO's don't do automated tasks, like send orders to suppliers, attach PO's to BO's, etc.

Is there a way to get rid of these open quantities on canceled or expired orders?
To mass cancel them, don't think so.
You should use SQL to move to 0 quantity and amount open