How To Fix WN463 - Existing BP &1 will be assigned; maintain customer and supplier

WN463 - Overview

• Message type: E = Error

• Message class: WN - Plant master data maintenance (integrated)

• Message number: 463

• Message text: Existing BP &1 will be assigned; maintain customer and supplier

What causes this issue?

You are creating a plant and need to assign a business partner to the
plant.
The business partner you want to assign has currently neither the
required customer nor the required supplier assigned.

System Response

It is not possible to assign a business partner without a customer to a
plant. If the plant profile of the plant also requires a supplier, it is
not possible to assign a business partner without a supplier to the
plant.

How to fix this error?

Use the business partner maintenance to extend the business partner by a
customer and a supplier.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

WN463 - Details

• The SAP error message WN463 indicates that there is an issue with the assignment of a Business Partner (BP) in the system. Specifically, it suggests that an existing Business Partner is being assigned, but the system requires that both customer and supplier roles be maintained for that Business Partner.
  
  Cause:
  The error typically arises in the following scenarios:
  
  Incomplete Data: The Business Partner has been created, but the necessary roles (customer and/or supplier) have not been assigned or maintained.
  Role Assignment: The system expects that if a Business Partner is to be used in a certain context (e.g., as both a customer and a supplier), both roles must be properly configured.
  Data Consistency: There may be inconsistencies in the data related to the Business Partner, leading to the system not being able to process the assignment correctly.
  
  
  Solution:
  To resolve the WN463 error, you can follow these steps:
  
  
  Check Business Partner Roles:
  
  Go to the Business Partner transaction (e.g.,