Usuwanie stringa z configu

if (CustomConfig.get().getStringList("God").contains(player.getDisplayName())){
                      List<String> playername = CustomConfig.get().getStringList("God");
                              playername.remove(player.getDisplayName().toString());
                              CustomConfig.save();
                              CustomConfig.reload();
                              player.sendMessage("You are no longer in god mode");

Pomocy, nie usuwa z pliku gracza. Normalnie go zapisuje, ale nie usuwa. Szybko!