Auto generate builtin/entity for shiled data gen.

I have the current code when i try to generate it it says Model at :builtin/entity does not exist. How would i get ride of the :

private fun shield(block: Block, item: Item) {
        val name = item.name
        getBuilder(name)
            // "builtin/entity"
            .parent(
                // need to remove minecraft: somehow
                ModelFile.ExistingModelFile(
                    ResourceLocation("", "builtin/entity"), existingFileHelper))
            .guiLight(BlockModel.GuiLight.FRONT)
            .texture("particle", "block/${block.bName}")
            .transforms()
            .transform(ItemDisplayContext.THIRD_PERSON_RIGHT_HAND)
            .rotation(0f, 90f, 0f)
            .translation(10f, 6f, -4f)
            .scale(1f, 1f, 1f)
            .end()
            .transform(ItemDisplayContext.THIRD_PERSON_LEFT_HAND)
            .rotation(0f, 90f, 0f)
            .translation(10f, 6f, 12f)
            .scale(1f, 1f, 1f)
            .end()
            .transform(ItemDisplayContext.FIRST_PERSON_RIGHT_HAND)
            .rotation(0f, 180f, 5f)
            .translation(-10F, 2F, -10F)
            .scale(1.25f, 1.25f, 1.25f)
            .end()
            .transform(ItemDisplayContext.FIRST_PERSON_LEFT_HAND)
            .rotation(0f, 180f, 5f)
            .translation(-10F, 0F, -10F)
            .scale(1.25f, 1.25f, 1.25f)
            .end()
            .transform(ItemDisplayContext.GUI)
            .rotation(15F, -25F, -5F)
            .translation(2F, 3F, 0F)
            .scale(0.65f, 0.65f, 0.65f)
            .end()
            .transform(ItemDisplayContext.FIXED)
            .rotation(0F, 180F, 0F)
            .translation(-4.5F, 4.5F, -5F)
            .scale(0.55F, 0.55F, 0.55F)
            .end()
            .transform(ItemDisplayContext.GROUND)
            .rotation(0F, 0F, 0F)
            .translation(2F, 4F, 2F)
            .scale(0.25F, 0.25F, 0.25F)
            .end()
            .end()
            .override()
            .predicate(mcLoc("blocking"), 1f)
            .model(getExistingFile(mcLoc("item/$name")))
            .end()

        shieldBlock(block, item)
    }

    private fun shieldBlock(block: Block, item: Item) {
        val name = item.name + "_blocking"
        getBuilder(name)
            .parent(ModelFile.UncheckedModelFile(ResourceLocation("builtin/entity")))
            .guiLight(BlockModel.GuiLight.FRONT)
            .texture("particle", "block/${block.bName}")
            .transforms()
            .transform(ItemDisplayContext.THIRD_PERSON_RIGHT_HAND)
            .rotation(45F, 135F, 0F)
            .translation(3.51F, 11F, -2F)
            .scale(1F, 1F, 1F)
            .end()
            .transform(ItemDisplayContext.THIRD_PERSON_LEFT_HAND)
            .rotation(45F, 135F, 0F)
            .translation(13.51F, 3F, 5F)
            .scale(1F, 1F, 1F)
            .end()
            .transform(ItemDisplayContext.FIRST_PERSON_RIGHT_HAND)
            .rotation(0F, 180F, -5F)
            .translation(-15F, 5F, -11F)
            .scale(1.25f, 1.25f, 1.25f)
            .end()
            .transform(ItemDisplayContext.FIRST_PERSON_LEFT_HAND)
            .rotation(0F, 180F, -5F)
            .translation(-15F, 5F, -11F)
            .scale(1.25f, 1.25f, 1.25f)
            .end()
            .transform(ItemDisplayContext.GUI)
            .rotation(15F, -25F, -5F)
            .translation(2F, 3F, 0F)
            .scale(0.65f, 0.65f, 0.65f)
            .end()
            .end()
    }