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 the partner functions associated with the existing business partner.
  Determine if the partner function you are trying to use is already assigned to another business partner.
  
  
  
  Modify or Delete Existing Entries:
  
  If the existing business partner is not needed, you can consider deleting it or changing its partner function.
  If the existing business partner is required, you may need to choose a different partner function or create a new business partner with a unique ID.
  
  
  
  Data Consistency Check:
  
  If this error occurs during data migration, ensure that the data being imported does not contain duplicates.
  Use tools like SAP Data Services or LSMW (Legacy System Migration Workbench) to validate and clean your data before migration.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to business partner management for any specific guidelines or updates that may pertain to your version of SAP.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as BP (Business Partner), SE11 (Data Dictionary), and SE16 (Data Browser) for checking tables related to business partners.
  Business Partner Roles: Understand the different roles and partner functions associated with business partners in your SAP system.
  SAP Notes: Search for SAP Notes related to CMS_RE051 for any patches or updates that may address this issue.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.