SAP Knowledge Base Article - Public

2885089 - Error: First Partner not Valid; Partner is Already Involved in Relationship


You are trying to maintain a Netting relationship between one supplier and three customers.

The system throws the error 'First partner not valid; partner is already involved in relationship.'


SAP Business Bydesign

Reproducing the Issue

  1. Go to the Supplier Base work center.
  2. Go to the Suppliers view.
  3. Select the Supplier XYZ (representing the Supplier ID).
  4. In the Masterdata navigate to the Contacts tab and from here to the Relationships sub-tab.
  5. Press Add row.
  6. Select Relationship Type Nettable with. 
  7. In the Business Partner column, enter Customer ABC. 
  8. Repeat steps 5 to 7 for customer DEF, GHI (ABC, DEF, GHI represent Customer IDs). 
  9. Press Save. 

The system throws the error 'First partner not valid; partner is already involved in relationship.'


You can only maintain one netting relationship with a business partner.


Netting can be done between the following types of accounts:

  • Mixed Accounts

If a customer (account) is also a supplier in the system, then this business partner is automatically considered for netting during the clearing process. In such a scenario, the open items for both receivables and payables are considered while creating a payment proposal.

  • Nettable Accounts

The Netting function allows you to maintain a netting relationship between two business partners. Once you have done so, when you clear open items manually, the open items for both the business partners are available for selection.

In sum, a netting relationship of one Supplier with three different Customers is not allowed in Business Bydesign.

See Also

Netting of Payables and Receivables


Netting, First Partner not valid. , KBA , netting , AP-ACC , Business ByDesign: Financial Accounting , Problem


SAP Business ByDesign all versions