We have a third party system where PO's are created and imported into Oracle as an approved PO via Standard interface table. A PO was created in Aug 2012 and is stuck in interface tables with rejected status as the vendor site ID missing. So updated the interface table with vendor site ID. And ran import standard PO program. PO is imported but with the date in FEB 2013 instead of the date in Aug 2012. ( As the PO period for Feb 2013 is opened)Why it happened? And is there any way I can cancel/delete the PO from Oracle and resend it with the same old date I.e., Aug 2012 date and so that it can create with old PO Number.