custom json model parent

so i want to use a model parent.
using the vanilla pack i added the parent to the minecraft namespace
but mcreator just wont accept my model.

here's the code for the model

{
  "parent": "minecraft:block/gel",
  "textures": {
    "gel": "random:block/speed_gel"
  }
}

and here's the main model (within the vanilla pack)

{
	"textures": {
		"particle": "#gel"
	},
	"elements": [
		{
			"from": [0, 0, 0],
			"to": [16, 16, 0.25],
			"faces": {
				"north": {"uv": [0, 0, 16, 16], "texture": "#gel"},
				"east": {"uv": [0, 0, 0.25, 16], "texture": "#gel"},
				"south": {"uv": [0, 0, 16, 16], "texture": "#gel"},
				"west": {"uv": [0, 0, 0.25, 16], "texture": "#gel"},
				"up": {"uv": [0, 0, 16, 0.25], "texture": "#gel"},
				"down": {"uv": [0, 0, 16, 0.25], "texture": "#gel"}
			}
		}
	]
}

help please?