How To Fix CMS_RE051 - Business partner ID &1 already exists in parnter function &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CMS_RE - Message class for CMS Real Estate Add On

• Message number: 051

• Message text: Business partner ID &1 already exists in parnter function &2

What causes this issue?

A business partner can assume more than one partner function but not the
same partner function more than once.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CMS_RE051 - Business partner ID &1 already exists in parnter function &2 ?

  The SAP error message CMS_RE051 indicates that a business partner (BP) ID you are trying to create or assign already exists in the specified partner function. This error typically occurs in the context of managing business partners in SAP Customer Relationship Management (CRM) or SAP S/4HANA.
  
  Cause:
  The error arises when you attempt to create a new business partner with an ID that is already in use for a specific partner function. This can happen due to:
  
  Duplicate entries in the business partner master data.
  An attempt to assign a business partner to a partner function that is already occupied by another business partner.
  Data inconsistencies or errors during data migration or integration processes.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Existing Business Partners:
  
  Use transaction code BP to access the Business Partner transaction.
  Search for the business partner ID in question to confirm its existence and check its assigned partner functions.
  
  
  
  Review Partner Functions:
  
  Navigate to