SAP Message 1J049 - Payment order &2 in bank area &1 posted, item transf. to pay. transaction

Diagnosis
Payment order &V2& in bank area &V1& was posted.
Payment items were created from the payment order that also affectaccounts outside the SAP system. The ordering party item (or the firstpayment item ) was posted, all other items were transferred to theexternal payment transactions for editing.