Occasional Visitor

I have gotten my timetable and have been removed from one of the lectures.

I'm doing a double degree physics and engineering- telecommunications with honors (BH097). I've been removed from my calculus and analysis 1 lecture but it is a necessary class I need to do. This lecture only has one time option and it clashes with my my material physics practical. All options for the material physics class clash with lectures. I dont know what to do?