How To Fix FINS_FI_MIG312 - Already existing entry changed for table &1: &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FINS_FI_MIG - SAP S/4HANA Finance: Data Migration

• Message number: 312

• Message text: Already existing entry changed for table &1: &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FINS_FI_MIG312 - Already existing entry changed for table &1: &2 ?

  The SAP error message FINS_FI_MIG312 indicates that there is an issue with data migration, specifically that an entry that already exists in a specified table has been changed. This error typically arises during the migration of financial data, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  The error occurs when:
  
  Duplicate Entries: The migration process is attempting to insert or update a record in a table where an entry with the same key already exists, but the data being migrated is different from the existing entry.
  Data Consistency Issues: There may be inconsistencies in the data being migrated, such as changes in the source system that were not reflected in the migration files.
  Incorrect Mapping: The mapping of fields from the source to the target system may not be correctly defined, leading to conflicts.
  
  Solution:
  To resolve the FINS_FI_MIG312 error, you can take the following steps:
  
  
  Identify the Table and Entry: The error message will specify the table (&1) and the entry (&2) that is causing the issue. Use this information to investigate the existing data in the target system.
  
  
  Check Existing Data: Query the target table to see the existing entry that is causing the conflict. Compare it with the data you are trying to migrate.
  
  
  Data Validation: Ensure that the data in the source system is accurate and consistent. If there are discrepancies, correct them in the source data before attempting the migration again.
  
  
  Adjust Migration Files: If the migration files contain incorrect or outdated information, update them to reflect the correct data.
  
  
  Use Update Instead of Insert: If the intention is to update existing records, ensure that the migration process is set to perform updates rather than inserts for those entries.
  
  
  Consult Documentation: Review SAP documentation related to the migration process for any specific guidelines or best practices that may apply to your situation.
  
  
  Error Logs: Check the migration logs for additional details about the error, which may provide further insights into what went wrong.
  
  
  Testing: After making the necessary adjustments, perform a test migration with a smaller dataset to ensure that the issue has been resolved before proceeding with the full migration.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools and guidelines for data migration.
  Data Migration Best Practices: Review best practices for data migration in SAP environments to minimize the risk of encountering similar issues in the future.
  
  By following these steps, you should be able to resolve the FINS_FI_MIG312 error and successfully complete your data migration process.