Defect with employee type group master screen.

1) code already exist validation to be corrected on add.
2) Not able to inactivate non-referred data.
3) Not able to Delete non-referred data.
4) code already exist validation to be corrected on update.
5) Referred record cannot be inactivated.
6) Referred record cannot be deleted.
(Audit log not checked: for tester use only)