Time Conflict Allowed?

Hello,

I'm trying to take COG SCI 1 (lecture are 10:00 am-12:59pm) and EECS 126 (Lecture is 12:30-1:59pm), so there is a 30 minute overlap. I searched it up and it says COG SCI 1 by default doesn't allow time conflicts, however EECS 126 allows for it. Does this logistically work out on Cal Central? That I first sign up for COG SCI, then sign up for EECS 126? Is there some time conflict override thing that appears? I haven't dealt with conflicts before so I'm a bit confused.