Help with custom model data armor

I want to make a resource pack where custom model data armor is a different look of armor This is going to have a datapack eventually where you craft a diamond piece and a red dye and it gives the custom model data It is not working currently. It is a purple and black item in my hand, and looks like diamond armor on my head. Here are the only logs: 12:35:08.385 net.minecraft.class_1092 Worker-Main-21 Missing textures in model minecraft:diamond_helmet#inventory: minecraft:textures/atlas/blocks.png:test:models/armor/diamond_red 12:35:08.450 net.minecraft.class_1140 Render thread Missing sound for event: minecraft:item.goat_horn.play 12:35:08.450 net.minecraft.class_1140 Render thread Missing sound for event: minecraft:entity.goat.screaming.horn_break 12:35:08.595 net.minecraft.class_5944 Render thread Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program. If you want any code, please ask.