by the way what's your username on discord ?
after discuss this issue in discord, finally I understand the gympassmemory come from official script https://github.com/rathena/rathena/blob/master/npc/other/gympass.txt
to remove the weight learn from ALL_INCCARRY, the answer is just to remove this skill learn from your players
.... what a bummer, totally different direction
that's why I prefer to support over in discord, there are a lot of times members never explain properly on the forum
solved in discord