What is the X icon next to a quest name?

I have a [X] at the beginning of the quest name of Soul without Life in my quest log. Does this mean anything?

Thanks!

As far as I can tell, it means you have to complete the quest as the class you accepted it as? It only appears on the Anima line, though.

You can have a [X] on levequests that have been failed/abandoned as you need to spend another leve allotment to retry them.

For the anima quests, it likely means you are not the class you picked up the quest as - as Elamys mentioned.