Is there a word to describe the case when a student can only receive credit for one of a group of courses because they are versions of a single course?
For example, "Accelerated Elementary Statistics" and "Elementary Statistics" - these have different course numbers but I would only want a student to be able to take one of these courses for credit.
Context: I'm designing course scheduling software and want to be able to describe/refer to this situation concisely to inform students and communicate with administrators who are designing course catalogues and requirements.