配方无法加载

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "WWW",
    "WR ",
    "WWW"
  ],
  "key": {
    "W": {
      "tag": "minecraft:command_block"
    },
    "R": {
      "item": "minecraft:apple"
    }
  },
  "result": {
    "id": "toyomod:custom_item",
    "count": 4
  }
}

[22:21:22] [Worker-Main-1/ERROR] (Minecraft) Couldn't parse data file 'toyomod:custom_block' from 'toyomod:recipe/custom_block.json': DataResult.Error['Map entry 'W' : Failed to parse either. First: No key fabric:type in MapLike[{"tag":"minecraft:command_block"}]; Second: Failed to parse either. First: Not a string: {"tag":"minecraft:command_block"}; Second: Failed to parse either. First: Not a json array: {"tag":"minecraft:command_block"}; Second: Not a string: {"tag":"minecraft:command_block"}']

在mc mod编写无法加载配方