Dauntless Ahri changed to Challenger Ahri

Hello people of Riot Games! I just wanted to ask the simple question of why change the name to upcoming skin? I am not meaning to insult the new name or bring any hatred to you guys, I just simply want to know why. Was the name "Dauntless" a lore problem with Garen's "Dauntless Vanguard"? Maybe the name was more fitting or maybe you simply thought the name was better. All I would like is a explanation for the name change. Thanks!