How To Fix CMD_API051 - Customer &1: Contact person with partner number &2 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CMD_API - Customer APIs

• Message number: 051

• Message text: Customer &1: Contact person with partner number &2 already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CMD_API051 - Customer &1: Contact person with partner number &2 already exists ?

  The SAP error message CMD_API051 indicates that there is an attempt to create or modify a contact person for a customer, but the contact person with the specified partner number already exists in the system. This error typically arises in the context of customer master data management.
  Cause:
  The error occurs due to the following reasons:
  
  Duplicate Entry: The contact person you are trying to add already exists in the system with the same partner number.
  Data Entry Error: There may have been a mistake in entering the partner number or customer details, leading to an attempt to create a duplicate record.
  Data Migration Issues: If data was migrated from another system, duplicates may have been created inadvertently.
  
  Solution:
  To resolve the CMD_API051 error, you can take the following steps:
  
  
  Check Existing Records:
  
  Use transaction codes like BP (Business Partner) or XD03 (Display Customer) to search for the existing contact person using the partner number.
  Verify if the contact person already exists for the specified customer.
  
  
  
  Modify Existing Contact:
  
  If the contact person already exists and you need to update their details, use the appropriate transaction (e.g., BP or XD02) to modify the existing contact person instead of creating a new one.
  
  
  
  Use a Different Partner Number:
  
  If you are trying to create a new contact person, ensure that you are using a unique partner number that does not already exist in the system.
  
  
  
  Data Cleanup:
  
  If duplicates are found due to data migration or other issues, consider cleaning up the data by removing or merging duplicate records.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or consult with your SAP support team for specific guidelines related to managing contact persons and partner numbers.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as BP, XD01 (Create Customer), XD02 (Change Customer), and XD03 (Display Customer).
  Business Partner Concept: Understand the Business Partner concept in SAP, as it is crucial for managing customer and vendor relationships.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  
  By following these steps, you should be able to resolve the CMD_API051 error and manage your customer contact data effectively.