How To Fix /PM0/ALQ_MIG_MSG021 - BO_ID,PARENT_ID,VERSION_ID(&1): duplicate data not permitted (conv.)

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ALQ_MIG_MSG -

• Message number: 021

• Message text: BO_ID,PARENT_ID,VERSION_ID(&1): duplicate data not permitted (conv.)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ALQ_MIG_MSG021 - BO_ID,PARENT_ID,VERSION_ID(&1): duplicate data not permitted (conv.) ?

  The SAP error message /PM0/ALQ_MIG_MSG021 BO_ID,PARENT_ID,VERSION_ID(&1): duplicate data not permitted (conv.) typically occurs during data migration or data processing tasks in SAP, particularly when dealing with Business Objects (BO) or similar data structures. This error indicates that there is an attempt to insert or process duplicate entries for a combination of BO_ID, PARENT_ID, and VERSION_ID, which is not allowed.
  Cause:
  
  Duplicate Entries: The most common cause of this error is the presence of duplicate records in the source data that you are trying to migrate or process. This could be due to data extraction issues or incorrect data preparation.
  Data Integrity Constraints: The system has integrity constraints that prevent the insertion of duplicate records for specific fields. This is a safeguard to maintain data consistency.
  Incorrect Mapping: If the mapping of fields during the migration process is incorrect, it may lead to the generation of duplicate entries.
  
  Solution:
  
  
  Identify Duplicates: Review the source data to identify any duplicate entries for the specified fields (BO_ID, PARENT_ID, VERSION_ID). You can use SQL queries or data analysis tools to find duplicates.
  
  Example SQL query:
  SELECT BO_ID, PARENT_ID, VERSION_ID, COUNT(*)
  FROM your_table
  GROUP BY BO_ID, PARENT_ID, VERSION_ID
  HAVING COUNT(*) > 1;
  
  
  
  
  Remove or Consolidate Duplicates: Once duplicates are identified, you can either remove them or consolidate the data as necessary. Ensure that the remaining records are valid and meet the business requirements.
  
  
  Check Data Mapping: If you are using a migration tool or process, verify that the mapping of fields is correct and that it does not inadvertently create duplicates.
  
  
  Adjust Migration Logic: If applicable, adjust the logic in your migration or data processing script to handle duplicates appropriately, such as skipping duplicates or merging records.
  
  
  Test Migration: After making the necessary adjustments, perform a test migration with a smaller dataset to ensure that the error does not occur again.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Data Migration Tools: If you are using specific SAP data migration tools (like LSMW, SAP Data Services, etc.), refer to their documentation for best practices on handling duplicates.
  Data Quality Checks: Implement data quality checks in your data preparation process to catch duplicates before they reach the migration phase.
  
  By following these steps, you should be able to resolve the error and successfully complete your data migration or processing task.