User blog comment:FairyRaven/Fairy Tail Chapter 337: The Golden Plains, Review and Commentary/@comment-2214433-20130628095736/@comment-77.195.192.48-20130628115201

I think Lucy AND Hisui was right at the same time, Hisui said nothing will be erased, it was the case. All actions made by the dragons and F Rogue were already the past, and nothing can change the past, 400 years ago, or 4 minutes ago, this is why Ultear could rewind the time to only 1 minute, this is the limit between the present and the past