How can we edit the IDR Invoice Qty when it is incorrected created documented by the IDR

We are using IDR to import invoices. We have a few vendors where the qty and the Manufacturer catalog number are very close, and the IDR picks up the Manufacturer Catalog number as the Qty. The Invoiced amount is correct just the Qty is some bizarre number. Unfortunately, that bizarre number is making it to extracts and we need to correct the Qty. The Oracle document states we should be able to correct the QTY, but it’s grayed out when you edit the invoice. We