Help with item model switching (changing)

I was trying to change my item model using this guide [ Tutorial ] Custom Model Data ( Dynamically Change Item Textures! ) | MCreator but textures of the 2nd item state arent loading (model is loading fine)
i didnt create a new folder instead i just put the new model in the same folder like one commentator suggested 
here is the whole json:

{
  "parent": "alt_tools:custom/spear",
  "textures": {
    "0": "alt_tools:block/seaspeas",
    "particle": "alt_tools:item/seaspeas"
  } ,
    "overrides": [
        { "predicate": { "custom_model_data": 1}, "model": "alt_tools:custom/spear2" }
 ]
}