I can't post an AP credit note with a debit amount on it.
'Story': We ordered material, we got this delivered and noticed then this wasn't the correct material. The supplier came to pick up this wrongly ordered material.
For this, a purchase order was created, the goods receipt was done (101) and also reversed (102). We received the invoice and off course booked it (item 20). Now we receive the credit note for this material (item 20) including a fee for the return of these goods (new item created: item 30 and GR done 101).
Please advice how to get this solved.