How To Fix RP434 - External person ID &1 is already used for another personnel number

SAP Error Message - Details

• Message type: E = Error

• Message class: RP - Error Messages for Infotype Module Pools

• Message number: 434

• Message text: External person ID &1 is already used for another personnel number

What causes this issue?

The system attempts to generate the external person ID in <ZK>infotype
0709</> but determined the person ID &1 because of the generation rule
defined in Customizing.
However, this value is already being used for another person.
Since the external person ID must be unique, the value for this current
personnel number remains empty.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Check the personnel numbers that use the same external person ID and
correct the external person ID manually in <ZK>infotype 0709</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RP434 - External person ID &1 is already used for another personnel number ?

  The SAP error message RP434 indicates that the external person ID you are trying to use is already associated with another personnel number in the system. This typically occurs during the creation or modification of employee records in the SAP Human Capital Management (HCM) module.
  Cause:
  
  Duplicate External Person ID: The external person ID you are trying to assign to a new personnel number is already linked to an existing personnel number. This can happen if:
  
  The same external ID is mistakenly assigned to multiple personnel records.
  Data migration or import processes have led to duplicate entries.
  An employee is being re-hired or transferred, and the external ID is not being handled correctly.
  
  
  
  Solution:
  
  
  Check Existing Personnel Numbers: 
  
  Use transaction codes like PA20 (Display HR Master Data) or PA30 (Maintain HR Master Data) to check if the external person ID is already assigned to another personnel number.
  If you find that the external ID is indeed linked to another employee, you will need to decide whether to use a different external ID for the new personnel number or to update the existing record.
  
  
  
  Update or Correct Data:
  
  If the external person ID is incorrectly assigned, you may need to correct the existing personnel record.
  If the employee is being re-hired, ensure that the correct process is followed to reassign the external ID.
  
  
  
  Data Migration: 
  
  If this issue arises during data migration, ensure that the migration process checks for existing external IDs and handles duplicates appropriately.
  
  
  
  Consult with HR or Data Management Team: 
  
  If you are unsure about how to proceed, consult with your HR or data management team to ensure that the integrity of personnel records is maintained.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as PA20, PA30, PA40 (for personnel actions), and SE16 (for table display) to investigate the issue further.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation on personnel administration and external person IDs for best practices in managing employee records.
  
  By following these steps, you should be able to resolve the RP434 error and ensure that external person IDs are managed correctly within your SAP system.