Server Error - Child full name 1 and Spouse full name 1 mapping to the fields on one subtemplate causing Server error

Steps:-
1.Create one template
2.Insert 3 fields on Subtemplate (Test)
3.Mapp those fields to the employee full name 1,Child Full name 1, Spouse full name to Test subtemplate
4.Export File

Actual result - It is giving server error
Expected result - It should not allow to mapp dependents macros on one subtemplate and it should not give error.

Error Log-
ErrorID : 0
ErrorSource : ControllerAppTier.Save->WORKTERRAControllerAppTier.Save->ExecuteExportDTS.ExportData_Isolated->WTIsolatedRoutines.Main->ExecuteExportDTS.ExportData->ExportProcessRowwise.ExportData->ExportProcessRowwise.FillDataIntoDataTable
ErrorMessage: Incorrect syntax near 'Employee'.

CC-Hrishikesh DeshpandeRakesh Roy