"No. You cannot modify an existing quiz by importing the modified resource into New Quizzes. New Quizzes imports can only be used when creating a quiz for the first time. Importing the same resource, even after deleting the original, will revert to the original quiz import.

To import changes to a New Quizzes quiz, you must duplicate the quiz and then import the new quiz into your course."

WHY????? Now if I need to make changes I have to create another one. That seems to be inefficient.  Can or will this feature be updated in the future? Or at least update the import feature so that it can overwrite the older version if needed?