How to solve mutation conflict

sorry, man. we haven’t save logs or runtime status etc when dgraph bulk running.
i’m not good at pprof tool, i can’t save memory profiles when bulk failed, and i also don’t know when will bulk failed, but i remember it failed at REDUCE stage completion between 28%~29% many time (more accurately, it’s about 28.7x%).

if i use --skip_map_phase flag to skip the map phase, will the data lost which has already REDUCEed and saved in the out directory ?