User blog comment:FairyRaven/Fairy Tail Chapter 337: The Golden Plains, Review and Commentary/@comment-1784397-20130629044951/@comment-7418318-20130629134747

I don't think that F-Lucy going back in time changed anything about her own origin timeline.

It either ceased to exist completely (being replaced by the current one) or it is unchanged, except for Lucy's absence, but that would only influence the future and thus couldn't make Levy disappear.