Situation
You attempt to edit a purchase amount of an inventoried item on a recorded purchase order and this message appears. You view the Items List Summary report and see that the Units On Hand quantity and the Total Value of the item are zero -- all have been sold.
Because you're attempting to edit the purchase amount, MYOB Premier Accounting attempts to change the value of the item only; Premier Accounting doesn't allow an inventory value for an item when there is a zero quantity for the item.
Note: To avoid this situation in the future, you should use the Receive Items feature.
Solution
Follow this procedure to edit the purchase order: