Hi Apoorva,

There is definitely a option for seat upgradation in UP counseling. The option is called as FLOAT, which means that you'll get a new seat or if your seat gets upgraded to new college according to your choice filling, then your old seat won't be considered or will get cancel, and your new seat is your final seat now. For more details of UP counseling visit this link once, it'll be very helpful https://engineering.careers360.com/articles/upsee-counselling. You have to make your mind once because if you'll get a new seat then this particular seat won't come back. 

All the best. Hope this helps you and for any further queries please do ask.