The contents of field Supplier Part Number are not copied over to a new document when you use the Copy function.
Reproducing the Issue
- Go to the Purchase Requests and Orders work center
- Go to the Purchase Orders view
- Select the purchase order you want to copy
- Click on Copy
- Verify that the Supplier Part Number field is blank, even though it is maintained in the original document.
This field is a field for purchase order items whose data is retrieved from the product master data, not from the copied purchase order. In your case, there is no product associated (product description and category is not sufficient), in which case the system cannot fetch the information from the master data.
This is the expected system behavior. You have to maintain the supplier part number information in the affected product's master data in order for the system to fill the field automatically.
KBA , supplier part number , field data , AP-PRP , Purchase Request Processing , How To