Previous Level exams were being broken by the part divider changes, fixed it.

src/components/Exercises/MultipleChoice.tsx

@@ -174,8 +174,7 @@ export default function MultipleChoice({ id, prompt, type, questions, userSoluti
 			<div className="self-end flex justify-between w-full gap-8 absolute bottom-8 left-0 px-8">
 				<Button color="purple" variant="outline" onClick={back} className="max-w-[200px] w-full"
 					disabled={
-						exam && exam.module === "level" && 
-						typeof exam.parts[0].intro === "string" && 
+						exam && exam.module === "level" &&
 						partIndex === 0 &&
 						questionIndex === 0
 					}