Invoice register is posted with wrong purchase order. During matching process via invoice pool, purchase order cannot be modified. It is advised to reverse invoice regsiter but this process is time consuming as just new purchase order should selected Workaround (may not work in all cases) • Go to the invoice pool • Delete in incorrect pending vendor invoice • Click purchase order to find the correct purchase order. • Submit invoice via workflow. • Remain in the screen to approve the pending vendor invoice.