Using in-house exams, if the exams are scheduled for different times, but you set up multiple exam instances for different in-house exams with the same date and time range, they will flag as a clash.
Once you've seated students for the first exam, you won't be able to seat students in the same seats for the second exam, because the system thinks these seats are still being used by students in the first exam.
You are only able to set up an instance for a period of time so students can sit the exams on different days if they are all doing the same exam.
To resolve this, change the times of the instances. You'll need to:
- Withdraw the students
- Amend the exam instance times
- Re-add the students
You can see how to do this here: Setting up In-house Examinations