SAP Knowledge Base Article - Public

3079794 - Error in Purchase Request : Only one supplier permitted


You are creating a purchase request and you get the following error:

Only one supplier permitted.


SAP Business ByDesign

Reproducing the Issue

  1. Go to Purchase Requests and Orders
  2. Select Manual purchase request
  3. Enter Buyer Responsible
  4. Add Supplier
  5. Select item that has list price and enter quantity.
  6. Select check
  7. Error: Only one supplier permitted and Only one contact person permitted

The error occurs when you enter the supplier before entering product details.


Error is only reproducible when adding supplier first, because the Product already has a supplier maintained & will be automatically determined.
(source of supply maintained e.g. a Contract or List Price or fixed source of supply)

So, when a supplier has already been entered manually, and the system attempts to determine the supplier from source of supply again on entering product details which has list price/contract etc, there is already an entry in the backend table and hence error occurs.


If you remove the supplier, the document will become consistent again.

If you enter the product details and then enter supplier, then error will not occur.


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