Undefined index under Channel Import

{
    "version": "6.0.3",
    "channels": [
        {
            "channel_title": "andres",
            "channel_name": "andres",
            "field_groups": [
                "andres"
            ],
            "fields": [],
            "cat_groups": [
                "Blog",
                "Slideshow"
            ]
        }
    ],
    "field_groups": [
        {
            "name": "andres",
            "fields": []
        }
    ],
    "statuses": [],
    "category_groups": [
        {
            "name": "Blog",
            "sort_order": "c",
            "categories": [
                {
                    "cat_name": "News",
                    "cat_url_title": "news",
                    "cat_description": null,
                    "cat_order": "1"
                },
                {
                    "cat_name": "Personal",
                    "cat_url_title": "personal",
                    "cat_description": null,
                    "cat_order": "2"
                },
                {
                    "cat_name": "Photos",
                    "cat_url_title": "photos",
                    "cat_description": null,
                    "cat_order": "3"
                },
                {
                    "cat_name": "Videos",
                    "cat_url_title": "videos",
                    "cat_description": null,
                    "cat_order": "4"
                },
                {
                    "cat_name": "Music",
                    "cat_url_title": "music",
                    "cat_description": null,
                    "cat_order": "5"
                }
            ]
        },
        {
            "name": "Slideshow",
            "sort_order": "a",
            "categories": [
                {
                    "cat_name": "Not Shown",
                    "cat_url_title": "not-shown",
                    "cat_description": null,
                    "cat_order": "1"
                }
            ]
        }
    ],
    "upload_destinations": []
}