[My query is about PNR 2345395760 for train 12237 BEGAMPURA EXP]
Waiting tickets holders are not allowed in reserved coach however you can travel in general coach if you take tickets from counter.
if you have e-ticket then your ticket will automatically get cancelled and if you travel based on that ticket then you will treated as passenger travelling without ticket and you will have to pay heavy penalty for that. so better to buy new general ticket from station to complete your journey in general class.
now if you have counter ticket then you can travel with that ticket in general coach with that ticket.
i am suggesting you to travel in general ticket because if you don’t get berths by TTE, then TTE may tell you to leave reservation coach and travel in general coach. left berths are generally allotted to RAC waiting list holder.