Recalculating student results after change to answers

Hello everyone,

Is it possible to recalculate a student's result in Moodle automatically if I change the correct answers after a student has already completed a task?

Unfortunately it happens frequently that some minor mishaps (such as small typos in the correct solutions) cause students to lose points and more importantly confuse them because they can't figure out why their answers are wrong. I found out how to change a student's score manually but that still doesn't mark their answer as correct.

Is there any way to implement this functionality or is the Grading API called only once on completion?

Regards,

Martin