I have had several Purchase Orders entered into Great Plains 10. I have accidentally received these Purchase Orders without Invoicing them. After I receive an invoice I have gone to invoice the Purchase Orders and they seem to be closed. I've then gone into the Transaction entry window and entered the PO. This has caused the Distributions to be posted twice. Once through the PO and then again in the Transaction entry window. How can I go back and either void the closed PO or remove the transactions to the posted accounts?