I recently noticed an error in one of the answers of one of my recent quizzes. It appears some of the students selected his answer (incorrectly) because of this error. I'm trying to modify the quiz grade so that they also get credit for this question. However after trying to change from "multiple choice" to "multiple answer" it says it won't permit a regrade. I tried to change it back to "multiple choice" and it says the same thing! Also now in quiz statistics it doesn't have a log of anyone's answers for this question so I can't even fix it manually anymore. Any hope for me to fix this would be great, but even if there's no chance of this, please fix this bug in your system so it doesn't happen again.