Hello aspirant,

Hope you are doing well,

For second round, candidates are not required to submit fresh choice. During the second round of online allotment process, the choice of higher preference will be upgraded for those candidates who give option to upgrade their choice at the time of admission at allotted of Colleges.

Check below link for further more details,

https://engineering.careers360.com/articles/bihar-ugeac-counselling

Hope this information helps,

Best of luck