SAP Message >4476 - Debit memo notification has already been created for this item

Procedure You can display a list of all debit memo notifications with the reportRFKKDDAL or the transactions FPDDA2 and FPDDA3. Payment method and payment group cannot be changed. If you want to reset the notification, use transaction FPDDA2 forbusiness partner &V1&, notification &V2& and the reset function.As a result, the payment method and payment group are reset in all itemsbelonging to the notification.