JSON Schema reporting error only for first element of array

I have the below JSON document.

[
    {
        "name": "aaaa",
        "data": {
            "key": "id",
            "value": "aaaa"
        }
    },
    {
        "name": "bbbb",
        "data": {
            "key": "id1",
            "value": "bbbb"
        }
    }
]

Below is the JSON Schema I have created for the above content.

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "array",
  "items": [
    {
      "type": "object",
      "properties": {
        "name": {
          "type": "string"
        },
        "data": {
          "type": "object",
          "properties": {
            "key": {
              "type": "string",
              "enum": [
                "id",
                "temp",             
              ]
            },
            "value": {
              "type": "string",
            }
          },
          "required": [
            "key",
            "value"
          ]
        }
      },
      "required": [
        "name",
        "data"
      ]
    }
  ]
}

As per the schema, the value of data.key is invalid for second item in the array. but any online schema validator does not find that. If we use different value in first array element, it throws the excepted error.

I assume that my schema is wrong somehow. what I expect is that any child items of the array should be reported if they have values out of the enum list.