No. There is clearly written at choice filling screen that all the future allotment will be done on the choice filled by you and there is no need to fill it again.
So wisely lock your choices.

The official notification for 1st round of counselling has been released on July 17, 2018. The concerned authorities will be conducting BCECE 2018 counselling from July 19, 2018 (10 A.M.) to July 25, 2018 (11:59 P.M.). Candidates who obtain a score equal to or above the qualifying marks will be eligible to participate in BCECE Counselling. The procedure will be held in multiple rounds (2 or 3).

https://static-collegedunia.com/public/college_data/images/entrance/entrance_brochure/1531830016bcece%202018%20counselling%20notice.pdf