@NobodyAtAll
Spoiler!
It's not only stop at that tho. You forgot the major problem. This memory is being used to rise pre-regression yoohyun from the dead (chapter 700+), with the help of the Gardener, one of the transcendent (this Gardener is also the one that create The Lunar Eclipse, Song Taewon). Pre-regression yoohyun become Gardener's subordinate. This will cause huge problem because two yoohyun cannot exist at the same world. This cause yoojin to go spiral 🥲 and both yoohyun to fight each other for the position as the only little brother in yoojin's world. It's very angst for both yoohyun really, especially when reading their interaction.. oh dear g** 
