How To Fix DB6PM923 - MDC setting already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 923

• Message text: MDC setting already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM923 - MDC setting already exists ?

  The SAP error message DB6PM923, which states "MDC setting already exists," typically occurs in the context of database management, particularly when dealing with the Multi-Database Container (MDC) settings in SAP HANA. This error indicates that there is an attempt to create or configure an MDC setting that already exists in the system.
  Cause:
  
  Duplicate Configuration: The error is primarily caused by an attempt to create a new MDC configuration that already exists in the database. This can happen if the configuration was previously set up and the system is trying to apply it again.
  Incorrect Script Execution: If a script or command is executed that attempts to create an MDC setting without checking for existing configurations, this error can occur.
  System Migration or Upgrade: During system migrations or upgrades, existing settings may conflict with new configurations being applied.
  
  Solution:
  
  
  Check Existing Settings: Before attempting to create a new MDC setting, check the existing configurations in the system. You can do this by querying the relevant system tables or using the SAP HANA Studio or Cockpit to view current MDC settings.
  SELECT * FROM M_DATABASES WHERE DATABASE_NAME = '<your_database_name>';
  
  
  Modify or Delete Existing Configuration: If you find that the MDC setting already exists and you need to change it, consider modifying the existing configuration instead of creating a new one. If the existing setting is no longer needed, you may delete it.
  DROP DATABASE <your_database_name>;
  
  
  Use Conditional Logic in Scripts: If you are running scripts to create MDC settings, implement conditional logic to check for the existence of the setting before attempting to create it. This can prevent the error from occurring.
  IF NOT EXISTS (SELECT * FROM M_DATABASES WHERE DATABASE_NAME = '<your_database_name>') THEN
      CREATE DATABASE <your_database_name>;
  END IF;
  
  
  Consult Documentation: Review the SAP HANA documentation for best practices regarding MDC configurations and management. This can provide insights into how to properly manage database settings.
  
  
  Contact SAP Support: If the issue persists or if you are unsure about making changes, consider reaching out to SAP Support for assistance. They can provide guidance based on your specific system configuration and requirements.
  
  
  Related Information:
  
  SAP HANA Documentation: Refer to the official SAP HANA documentation for detailed information on managing MDC settings.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to resolve the DB6PM923 error and manage your MDC settings effectively.