I have resit students. Why? Because they failed the course and need to do it again. Fair enough but resit students bring with them one or two points to consider:
1)Motivation. Are they motivated to improve and pass the course?
2)Will the materials be the same or will they be changed to accommodate a few resit students?
3)Do students lose points or get punished for resitting or is it just an easy doss?
4)How much blame should the teacher take for these students resitting?
5)How many times have they resat? It could be just once or twice.
6)Is there a problem with the actual course or the final test which is creating failure?
I am currently wrestling with all of the above.