Shahna, there are two rounds of counselling conducted by CDAC. If you have been allotted a seat in the first round itself, you need to pay an upgradation fee if you want to get upgraded to a choice that was ranked higher by you than what you have been allotted now, if seats are available.

In your case, you have already got your first preference college. So you cannot sit for the next rounds and get a college that was your second preference.