How To Fix HRPADUN_GEN400 - &1 is not unique. Please choose another Number.

SAP Error Message - Details

• Message type: E = Error

• Message class: HRPADUN_GEN - Messages for UN Developement

• Message number: 400

• Message text: &1 is not unique. Please choose another Number.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message HRPADUN_GEN400 - &1 is not unique. Please choose another Number. ?

  The SAP error message "HRPADUN_GEN400 &1 is not unique. Please choose another Number." typically occurs in the context of HR (Human Resources) module transactions, particularly when dealing with personnel numbers, employee IDs, or similar identifiers. This error indicates that the system has detected a duplicate entry for a number that is supposed to be unique.
  Cause:
  
  Duplicate Entry: The most common cause is that the number you are trying to enter (e.g., a personnel number) already exists in the system.
  Configuration Issues: There may be issues with the configuration of number ranges in the system, leading to conflicts.
  Data Migration: If data has been migrated from another system, it’s possible that duplicate entries were introduced during the migration process.
  Concurrent Processing: If multiple users are trying to create or modify records simultaneously, it may lead to conflicts.
  
  Solution:
  
  Check Existing Records: Verify if the number you are trying to use already exists in the system. You can do this by searching for the personnel number or ID in the relevant HR tables (e.g., PA0001 for personnel data).
  Choose a Different Number: If the number is indeed taken, you will need to select a different, unique number for the new entry.
  Review Number Ranges: Check the configuration of number ranges in the system to ensure they are set up correctly and that there are no overlaps.
  Data Cleanup: If duplicates were introduced during data migration, you may need to clean up the data to remove duplicates or consolidate records.
  Locking Mechanism: Ensure that there are no issues with locking mechanisms that might be causing concurrent processing problems.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like PA30 (Maintain HR Master Data) or PA40 (Personnel Actions) to investigate and resolve the issue.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Authorization: Ensure that you have the necessary authorizations to create or modify personnel numbers.
  Consult Documentation: Refer to SAP HR documentation for guidelines on managing personnel numbers and understanding number ranges.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or HR module support team for further assistance.