A professor has imported several quizzes in the GIFT format. The files were not formatted correctly (UTF8) but Moodle took them anyway. Now that students have taken the quizzes, the "marks" for the majority of the questions is set at 100 instead of 1. So instead of students getting a 24/25 or 23/25, they are getting 2000/25.
I've run some modifications to the questions, with phpmyadmin. E.G.
SET fraction = '1'
WHERE fraction = '100' AND question BETWEEN 5479 AND 5503
This fixes the questions, which were not displaying a 100% for a correct answer, but it doesn't fix the student's attempt. It seems like I need to "refresh" the score, but running a regrade doesn't work.