Player player = event.getPlayer();
      NBTManager manager = NBTManager.getInstance();
      NBTCompound playerdata = manager.read(player);
      if (playerdata.containsKey("Attributes")) {
          NBTList atkey = playerdata.getList("Attributes");
          NBTList.NBTIterator subkeys = atkey.listIterator();
          while (subkeys.hasNext()) {
              NBTCompound sub = (NBTCompound) subkeys.next();
              if (sub.containsKey("Modifiers")){
                  sub.remove("Modifiers");
              } // if modifiers
          } // end iterator
          manager.write(player, playerdata);