Hello,

No, you don't need to submit all the documents again. You just need to report again for the sake of either freezing the seat or going for the float again to second CSAB round. Your documents have been verified and as you had to report in NIT Bhopal after r7, your admission has also been done, thus all you will be needing is to re-report for the document verification stage and if you want to take admission again with new department and changed enrollment number, nothing else will change until your institute changes in the next rounds which is a rarity.