User blog comment:FairyRaven/Fairy Tail Chapter 327: My Part Too, Review and Commentary/@comment-3555799-20130412201424/@comment-7418318-20130414124722

So you're proposing the following scenario? So because of f-Lucy's (who never closed the door) interference the timeline was altered in a way that Lucy actually closed the gate. Because she closed the gate (due to her future self coming back) f-Rogue traveled back in time to prevent her from closing the gate.

BUT if f-Rogue hadn't attacked them, Lucy-tachi would either have fled Mercuius or been overwhelmined by the Garou Knights, thus eliminating the reason why f-Rogue would have come back in time in the first place....