Quiz questions disassociated from quiz upon revision deletion

I used the Revision Deletion module to delete older revisions of a quiz to display the statistics in a user friendly way. All but the current revisions were deleted. But now when I try to take the quiz as an admin I get this message: "No questions were found. Please assign questions before trying to take this Quiz.
Please assign questions..."
I also noticed that the quiz had the original questions when I navigate to Manage Questions, so I'm assuming the question-quiz relationships were messed up. Does anyone have any suggestions on how to fix this?