PRS ticket mein ho sakta hai. Definitely. I have done it personally in 12439 from bksc. U have to fill the fresh form and write modification on it and surrender the ticket.new tkt will be issued in lieu of it for same class, same train and same stn. I was charged 60/- for it but that was 4 yrs back when the cancellation charges for 3 A was 60/- only