Message type: E = Error
Message class:  HRPAYAT_3670 - Insured Person Notif. Infotype 3670 (SI Notif. Suppl. A) 
Message number: 002
Message text: Field for employment days must remain initial
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The SAP error message HRPAYAT_3670002, which states "Field for employment days must remain initial," typically occurs in the context of payroll processing in the SAP HR module. This error indicates that a specific field related to employment days is not supposed to have any value assigned to it during a certain operation, such as payroll calculation or data entry.
Cause: Incorrect Data Entry: The error may arise if a user inadvertently enters a value in a field that is expected to be left blank (initial).
Configuration Issues: There may be a configuration issue in the payroll schema or in the infotype settings that leads to this field being populated incorrectly. Custom Enhancements: If there are custom developments or enhancements in the payroll process, they might be incorrectly populating this field. Data Migration Issues: If data was migrated from another system, it might not conform to the expected format or rules in SAP.
Solution: Check Data Entry: Review
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