This discussion has been marked 'assume answered'.
You are right, you have flagged this discussion as a question but then you did mark the question as 'assume answered'.
Now if you want to get it back as question, then just put a reply into your discussion, then mark your reply as correct, then unmark the correct answer, then your discussion will be as a question again, then you can delete your reply (you need to do that because you haven't received any reply yet for your discussion).
If you have found an answer for your discussion, then you can post the answer as reply and mark it as correct answer.