What would be the kpop equivalent to the Luka Lakers trade?

Context: I may not know that much about the NBA but this is what I’m getting from it: they traded their star player for someone that is no where near that level/on the decline

I feel the kpop equivalent to this is if Cube let GIDLE go in the basement/disband them to focus on their other groups. Or if Starship fired Wonyoung and replaced her with someone else

Hilariously the last time I felt the level of shock I’m sure nba fans are feeling was when Somi went from JYP to the Black Label or when Sakura left AKB48 and ended up signing with HYBE lol. Obviously these situations didn’t have that kind of drawback to the trade I think Luka-AD has.