How To Fix FDM_MIRROR094 - Tab. FDM_CONT_MIRROR: external key (&1, &2, &3) exists more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: FDM_MIRROR - Mirror System Messages

• Message number: 094

• Message text: Tab. FDM_CONT_MIRROR: external key (&1, &2, &3) exists more than once

Self-Explanatory Message

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• What is the cause and solution for SAP error message FDM_MIRROR094 - Tab. FDM_CONT_MIRROR: external key (&1, &2, &3) exists more than once ?

  The SAP error message FDM_MIRROR094 indicates that there is a duplicate entry for an external key in the table FDM_CONT_MIRROR. This error typically arises in the context of Financial Data Management (FDM) when the system detects that the same external key (which could be a combination of fields like company code, document number, etc.) is present more than once in the specified table.
  Cause:
  
  Duplicate Data Entry: The most common cause is that the same external key has been entered multiple times in the system, leading to a violation of the uniqueness constraint.
  Data Migration Issues: If data was migrated from another system or imported in bulk, it’s possible that duplicates were inadvertently included.
  Integration Issues: If multiple systems are integrated and sending data to the FDM, there may be a lack of proper checks to prevent duplicates.
  
  Solution:
  
  
  Identify Duplicates: 
  
  Use SQL queries or transaction codes to check the FDM_CONT_MIRROR table for duplicate entries based on the external key. You can run a query like:
  SELECT external_key, COUNT(*)
  FROM FDM_CONT_MIRROR
  GROUP BY external_key
  HAVING COUNT(*) > 1;
  
  This will help you identify which external keys are duplicated.
  
  
  
  Remove or Correct Duplicates:
  
  Once you identify the duplicates, you can either delete the extra entries or correct them if they are not supposed to be duplicates.
  Ensure that you have a backup of the data before making any deletions or modifications.
  
  
  
  Implement Data Validation:
  
  If the duplicates are a result of data entry or integration issues, consider implementing validation checks to prevent duplicates from being entered in the future.
  This could involve setting up unique constraints in the database or adding checks in the data entry process.
  
  
  
  Review Data Migration Processes:
  
  If the issue arose during a data migration, review the migration scripts or processes to ensure they include checks for duplicates before inserting data into the FDM tables.
  
  
  
  Consult Documentation or Support:
  
  If the issue persists or if you are unsure about how to proceed, consult SAP documentation or reach out to SAP support for further assistance.
  
  
  
  Related Information:
  
  FDM (Financial Data Management): This is a module in SAP that helps manage financial data across various systems and ensures data integrity.
  FDM_CONT_MIRROR Table: This table is used to store mirrored financial data, and it is crucial for maintaining consistency in financial reporting.
  External Key: This typically refers to a unique identifier used to link records across different systems or modules.
  
  By following these steps, you should be able to resolve the FDM_MIRROR094 error and prevent it from occurring in the future.