SAP Message 5F489 - Unknown birth month: code &1 must be included in &2 or &3.

Diagnosis
The month of birth code &V1& of the social security number is incorrect.If the employee's month of birth is unknown, enter a code from &V2& orV3.

System Response
The system displays a warning message.

Procedure
Correct the employee social security number; if the date of birth ismissing, complete the Identity (0002) infotype.
Procedure for System Administration