How To Fix CRM_SERVICE_OS121 - Serial number &1 is used more than once in transaction

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_SERVICE_OS - CRM Service: Subject Reference Object

• Message number: 121

• Message text: Serial number &1 is used more than once in transaction

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_SERVICE_OS121 - Serial number &1 is used more than once in transaction ?

  The SAP error message CRM_SERVICE_OS121, which states "Serial number &1 is used more than once in transaction," typically occurs in the context of service management or logistics when dealing with serialized products. This error indicates that the system has detected that a specific serial number is being referenced multiple times in a single transaction, which is not allowed.
  Cause:
  
  Duplicate Serial Number Entry: The most common cause is that the same serial number has been entered more than once in the transaction. This can happen if the user mistakenly adds the same item multiple times.
  System Configuration: There may be issues with how the system is configured to handle serial numbers, especially if there are custom developments or modifications.
  Data Integrity Issues: There could be underlying data integrity issues in the database, where the same serial number is incorrectly associated with multiple items or transactions.
  
  Solution:
  
  Check for Duplicates: Review the transaction to ensure that the serial number is only entered once. Remove any duplicate entries.
  Review Transaction Data: If you are using a batch input or an interface to create transactions, check the data being sent to ensure that serial numbers are unique.
  System Configuration: If the issue persists, consult with your SAP Basis or technical team to review the configuration related to serial number management. Ensure that the system is set up correctly to handle serialized items.
  Data Cleanup: If there are data integrity issues, you may need to perform a cleanup of the database or correct the entries in the relevant tables.
  Consult Documentation: Refer to SAP documentation or notes related to serial number management for any specific guidelines or known issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CRM_ORDER, CRM_SERVICE, or others that may be involved in the service order processing.
  SAP Notes: Check SAP Notes for any known issues or patches related to serial number handling in your version of SAP.
  User Training: Ensure that users are trained on how to properly enter serial numbers in transactions to avoid duplication.
  Support: If the issue cannot be resolved internally, consider reaching out to SAP support for assistance.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.