How To Fix CMS_CAG304 - Business partner ID &1 already exists in parnter function '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: CMS_CAG - Message Class for Collateral Agreement

• Message number: 304

• 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_CAG304 - Business partner ID &1 already exists in parnter function '&2' ?

  The SAP error message CMS_CAG304 indicates that there is an attempt to create or modify a business partner (BP) in a way that conflicts with existing data. Specifically, it means that a business partner ID already exists for the specified partner function.
  Cause:
  
  Duplicate Business Partner ID: The error occurs when you try to create a new business partner with an ID that already exists in the system for the specified partner function.
  Incorrect Data Entry: There may be a mistake in the data entry, such as entering the wrong business partner ID or partner function.
  Data Migration Issues: If data has been migrated from another system, there may be duplicates that were not properly handled.
  Configuration Issues: There may be issues with the configuration of partner functions or business partner roles.
  
  Solution:
  
  Check Existing Business Partners: Verify if the business partner ID you are trying to create already exists in the system. You can do this by using transaction codes like BP (Business Partner) to search for existing entries.
  Use a Different ID: If the ID already exists, consider using a different business partner ID that does not conflict with existing entries.
  Review Partner Functions: Ensure that the partner function you are trying to assign is appropriate and does not already have an existing business partner associated with it.
  Data Cleanup: If duplicates are found due to data migration or other issues, you may need to clean up the data by removing or merging duplicate entries.
  Consult Documentation: Review SAP documentation or consult with your SAP administrator for specific guidelines on managing business partners and partner functions.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as BP for managing business partners, SE11 for data dictionary, and SE16 for data browsing.
  SAP Notes: Check SAP Notes for any known issues or patches related to business partner management.
  User Roles and Authorizations: Ensure that you have the necessary authorizations to create or modify business partners in the system.
  SAP Community: Engage with the SAP Community or forums for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the CMS_CAG304 error and successfully manage your business partner data in SAP.