RecipeBookType ExtensibleEnum no longer works in 1.21.8

Updating to 1.21.8 from 1.21.5 and the recipe book type now throws an error. The exception has written "This is not implemented yet, poke Forge if you actually use this".

From net.minecraft.stats.RecipeBookSettings
// FORGE -- called automatically on Enum creation - used for serialization
    public static void register(RecipeBookType type) {
        String name = type.name().toLowerCase(java.util.Locale.ROOT).replace("_","");
        var codec = TypeSettings.codec("is" + name + "GuiOpen", "is" + name + "FilteringCraftable");
        //TAG_FIELDS.put(type, Pair.of(openTag, filteringTag));
        throw new IllegalStateException("This is not implemented yet, poke Forge if you actually use this");
    }

Edited August 21Aug 21 by TheSkullyKO
Version Tag