You have not maintained any Customer Part Number in the product master data, however when previewing a customer invoice, you find the Buyer ID fields shows the Product ID instead of showing blank.
Reproducing the Issue
- Go to the Customer Invoicing work center.
- Go to the Invoice Documents view.
- Find the certain invoice and click Preview.
You find in the preview layout, the Buyer ID equals to the Product ID, however you did not maintain any Buyer ID (Customer Part Number in the product master data). You think it should be blank if there is no Customer Part Number maintained.
In Customer Invoice form, if the Customer Part Number is not maintained, then the Buyer ID will be defaulted to Product ID and will not be shown as blank.
Additionally, in the Sales Order Confirmation form, the behavior is different. If the Customer Partner Number is not maintained, the Buyer ID shows blank.
This is the designed system behavior.
KBA , AP-CI , Customer Invoice Processing , How To