I am not sure what approach others would have followed but first thing that popped into my mind on seeing the error was which field is “ID number” in IT0002 and the thought that I have not seen a field called ID number in PA20 screen in IT0002 of SAP...

Check out this, this might help : https://help.sap.com/docs/SAP_HANA_PLATFORM/6b94445c94ae495c83a19646e7c3fd56/8ccc7fb52a704881a4a2b2e2c927b6f8.html?version=2.0.04/EmployeeConnection.net Insite