Update Trains Category by Converting of:-
Train:No:-06121/06122 Salem Junction(SA)-Vriddhachalam Junction(VRI)-Salem Junction(SA) DEMU Express Special Unreserved Covid(Category) to DEMU(Category) and also for
Train:No:-06831/06832 Salem Junction (SA)-Karur Junction(KRR)-Salem Junction(SA) DEMU Express Special Unreserved Covid(Category) to DEMU(Category)