Hi,

This can happen if the seats for other branch in NIT rourkela are filled so you can not get any other seat. And as you put the seat to slide option so with this only your branch can get upgraded and not college. Your college will be freezed. And upgradation of branch is very difficult. So yes please go and freeze your seat because after that you won't be able to do so.

I hope I was able to clear your doubt

Thank You