Conflicting Object and Array Configuration

{context}: properties and items cannot both be specified

{
  "defaults": {
    "enabled_stats": ["value_count"]
  },
  "refresh": { "trigger": "manual" },
  "dataset": {
    "fields": [
      {
        "field_name": "metadata",
        "properties": [
          {
            "path": "key",
            "enabled_stats": ["value_count"]
          }
        ],
        "items": {
          "enabled_stats": ["value_count"]
        }
      }
    ]
  }
}

{
  "field_name": "metadata",
  "properties": [
    {
      "path": "key",
      "enabled_stats": ["value_count"]
    }
  ]
}

{
  "field_name": "metadata",
  "items": {
    "enabled_stats": ["value_count"]
  }
}