What did he do on the 50th floor? I already forgot

Plus one i lost the plot after that he is in like broken dream of that guy

So basically MC was under leveled and forced his way into the 50th floor by making a deal with the librarian, killed lefanta, caused some chaos, and then died, so some constellations didn’t like that and since time rewind was a skill (not some op world breaking thing) the constellations remembered his stunt and decided to give him a debuff this new “side-story” as punishment