Guardia Real

i was curious about the aura of the robots, the costume, tried to go there but it tells me that i needed the quest, i've done it, and i noticed that the a quest doesn't actually end, What does this means, that you can turn in the quest as much as you like, so this it's an issue, since there's x1 challenge and you can just abuse this to do it, you can start the quest at 140 so it is a big deal, now i don't know if it works on both servers but on Niflheim it does