I asked on reddit too. Please help me

Looking for this manhwa
it was a sci fi one where there were teams sent into some place to clean up and in one particular team two members always fought and killed each other but were cloned every time one was cloned for like 100 times and on one of this mission they had to all hold hands and never let go but those two fighting got separated and then they had to kill everyone on their team. Im sorry i remember reading only few chapters so its not very clear