How To Fix LAW2_MESSAGES120 - The system keys are not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: LAW2_MESSAGES - LAW 2.0 Message Class

• Message number: 120

• Message text: The system keys are not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LAW2_MESSAGES120 - The system keys are not unique ?

  The SAP error message LAW2_MESSAGES120, which states "The system keys are not unique," typically occurs in the context of SAP Landscape Management (LaMa) or during system copy or system refresh operations. This error indicates that there are duplicate entries for system keys in the system landscape, which can lead to inconsistencies and issues in managing the systems.
  Cause:
  
  Duplicate System Keys: The most common cause of this error is that there are multiple entries in the system landscape with the same system key. This can happen if systems were copied or if there were manual entries that were not properly managed.
  Incorrect Configuration: Sometimes, incorrect configuration or manual changes in the system landscape can lead to non-unique keys.
  Data Migration Issues: If data was migrated from one system to another, it might have resulted in duplicate keys if not handled properly.
  
  Solution:
  
  Identify Duplicates: Use transaction codes like SICF or SMLT to check for duplicate entries in the system landscape. You can also use the SAP Landscape Management tool to view the systems and their keys.
  Remove Duplicates: Once you identify the duplicate entries, you will need to remove or correct them. This may involve deleting the duplicate entries or renaming them to ensure uniqueness.
  Check Configuration: Review the configuration settings in the SAP system to ensure that they are set up correctly and that there are no manual entries that could lead to duplicates.
  Consult Documentation: Refer to SAP documentation or notes related to landscape management for specific instructions on handling system keys and resolving this error.
  Contact SAP Support: If the issue persists or if you are unsure about making changes, it may be best to contact SAP support for assistance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this specific error.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  System Landscape Management (LaMa): Familiarize yourself with the functionalities of SAP Landscape Management, as it provides tools for managing system landscapes effectively.
  
  By following these steps, you should be able to resolve the error LAW2_MESSAGES120 and ensure that your system keys are unique within the SAP landscape.