Hello all - I (instructor) exported a quiz from a course I'm currently teaching and then re-uploaded the quiz to the same course so I could add the questions to a test bank I am building. Unfortunately, it now appears that the quiz I exported was "reset" and now all of the scores recorded in the grade book from the first time the students took the quiz are gone (all the normal submissions are now missing scores, but for some reason the grades for late submissions survived...). What did I do wrong and how can I fix this?