Crashes when opening the game specifically when the pack has gregtech

[amber dock]

Hi, this error happens when opening the pack when Gregtech is added:
Mod 'gtceu' encountered an error in a deferred task:
java.lang.ExceptionInInitializerError: null
at com.gregtechceu.gtceu.api.data.chemical.material.MarkerMaterials.register(MarkerMaterials.java:13) ~[gtceu-1.20.1-7.4.1.jar%23568!/:7.4.1]
Heres the full mclog: https://mclo.gs/VUZXk9f
Latest version of Gtceu is being used (7.4.1)

If needed i can provide the pack

[lean stump]

hey, what pack / what other mods are present / do you generate any other materials in kjs?

[amber dock]

Heyo
The other mods are listed on the crash log end or this html
No Kjs on it at least not yet, this is the first version of the pack we're trying to create

(better to download the html and open it on your browser)
If needed i can provide the pack curseforge zip too

[lean stump]

it's complaining about value already present: null in

    Caused by: java.lang.IllegalArgumentException: value already present: null

in

        at com.gregtechceu.gtceu.api.data.chemical.material.MarkerMaterials$Color.<clinit>(MarkerMaterials.java:79) ~[gtceu-1.20.1-7.4.1.jar%23568!/:7.4.1] {re:classloading}

in

        public static final HashBiMap<DyeColor, MarkerMaterial> COLORS = HashBiMap.create();

        static {
            for (var color : DyeColor.values()) {
                COLORS.put(color, Color.valueOf(color.getName()));
            }
        }

Which sounds like it means one of your mods is messing with Minecraft's DyeColor in a way that one of its values is null?

[amber dock]

hmmm, DyeColor you say

i can think of a few

im gonna try removing some of em that im suspecting of and ill update here

[lean stump]

kk lmk

[amber dock]

Found the culprit