Cannot import any PO on a project or any AP invoice matched with a project

Summary:

hey,

am trying to import a created PO that had been approved and have an accounting distribution with project details added in its lines

after that i went to import it from project costing ( import source : Purchasing ) but i didn't get any eligible data to be imported , and its not in the unprocessed transactions tab

also i had tried to create an AP invoice for this PO and to import it from project costing ( import source : Payables )

but it didn't get any transactions

also note that i had already done before many AP invoices that had been imported succefylly on the same project but without a matched PO