SAP Knowledge Base Article - Public

3211858 - Error: "Once you add the Assignment ID, you cannot change it later" - Employee Central


Error message is shown while importing Employment Details with the Assignment ID (assignmentIdExternal) populated:

[Once you add the Assignment ID, you cannot change it later.]


SAP SuccessFactors Employee Central

Reproducing the Issue

  1. Go to 'Import Employee Data';
  2. Select 'Import Data' and Entity 'Employment Details';
  3. Select the file containing the column assignmentIdExternal;
  4. Validate the import;
  5. Error message is shown.


This error message appears when the user already has an Assignment ID on their Employment Details and you are trying to import a different Assignment ID. 


Do not fill the value of the Assignment ID with a value different from the existing one. This value cannot be changed once it is assigned to the user. 

See Also

2825052 - Assignment ID 


assignment ID, employment details, import, error message , KBA , LOD-SF-EC-EDP , Import Employee Data (EC Core only) , LOD-SF-EC-EMP , Employment Information (Employment Details) , Problem


SAP SuccessFactors Employee Central all versions ; SAP SuccessFactors HCM all versions