I use StackModifier Plugin and for some reason with this plugin it allows skulls to stack, the reason this is bad is two enemy skulls will be combined then have the same name.

      "skull.human": {
        "ShortName": "skull.human",
        "ItemId": 996293980,
        "DisplayName": "Human Skull",
        "Modified": 1,
        "Disable": false

      "skull": {
        "ShortName": "skull",
        "ItemId": 1312843609,
        "DisplayName": "Skull",
        "Modified": 1,
        "Disable": false
      },

How can I fix this? My wolf skulls stack to the correct amount as in the config and every oher item works as intended.