Purchase order - Wrong Qty Received

In follow up of to this thread,

So we’ve tried to cancel the receipt on this PO (…/purchaseorder/8281/view) but have been unable to. Can you please help us change the qty received from quantity 3 (1875 pcs) to quantity 1 (625 pcs)? Thanks!

Has any of the inventory that was received been picked or inventory adjusted?

yes. inventory has been picked.