Currently, you can make a purchase or sales order for an item not in the item list. This is good for "on the fly" items - but it also creates the problem that when users make an error (typo, for example) it creates a sales order for an item we do not carry. We now have tens of invalid items in our item list, and we have missed order delivery because of this. We do not want the "on the fly" option - can we turn this off please? Thanks!!