Hello Atharva,

Yes, you can definitely change the priority of the colleges for next cap round. But you have to keep in mind one thing, that is, you should always keep the first prior college at the top position and least prior at the last or as the list consideration takes place. I am considering that in your counselling they are taking you top colleges in list as most prior ones. 

Hope you have understood and will be doing accordingly.

All the Best.