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

CRM_SERVICE_OS121 - Overview

• 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

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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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