Once you create a course section, add a teacher, & then save that section, it makes the teacher a required field. This means that if you want to delete that teacher later on it will not let you save it. It will only give you the error message saying a head teacher is required. Please change it so the teacher is not a required field, so the teacher can be deleted. This is helpful since I would be able to keep the room number and meeting times for that section. Thank you