I was wondering why I couldn't delete my own question. Well actually, I have accepted the question itself to be wrong and even I feel that I have accepted a wrong answer, but when I try to delete my question, I get a message saying that,"This question can't be deleted, flag it for moderator attention". Why is this happening and how can I solve this?
If answers have been provided, you would be deleting more than just your work/effort so it is quite fair that you cannot delete your question.
However, if you have a good reason for deleting the question, flag it for moderator attention (as per the message) and enter your reason and the moderators can decide whether it (and therefore other users answers) can be deleted. I'm sure there are plenty of situations that this is perfectly valid.
You can also check your flag weight page for information about flags you raise and this is where a moderator I think can leave a comment if they decide not to delete your question. Otherwise, post here (on MSO) for help about a specific question.
IANAL, but I think the way it's implemented right now violates CC-Wiki license.
The attribution clause means, that the attribution must be removed on author's request. In this case there is no way to do so. You cannot delete the question, which kind of makes sense as David pointed out. But neither can you remove your attribution (i.e. unlink question from your account).
If You create a Collection, upon notice from any Licensor You must, to the extent practicable, remove from the Collection any credit as required by Section 4(c), as requested.
IMO this should be fixed.