Sales that resulted in an item having an on-hand quantity of less than zero can't be purged

Unadjusted Sales transactions in your company file can't be purged.

The transactions are unadjusted and can't be purged because the anticipated Cost of Sales that was recorded on the sale has not been adjusted by recording the actual item cost amount. Adjusting entries can be made with a purchase, an auto-build or an inventory adjustment.

To see a list of your items with their on-hand count, use the Items List Summary report. Move your mouse over the Units On Hand amount (a magnifying glass icon appears) and click to open the Items Register window.