Что я делаю не так?

Question

[Артем]

Что я делаю не так?

Exception 'Elasticsearch\Common\Exceptions\BadRequest400Exception' with message '{"error":"MapperParsingException[mapping [products]]; nested: MapperParsingException[No handler for type [keyword] declared on field [value_string]]; ","status":400}'

try {
            $client->indices()->delete([
                'index' => 'shop'
            ]);
        } catch (Missing404Exception $e) {}

        $client->indices()->create([
            'index' => 'shop',
            'body' => [
                'mappings' => [
                    'products' => [
                        '_source' => [
                            'enabled' => true,
                        ],
                        'properties' => [
                            'id' => [
                                'type' => 'integer',
                            ],
                            'name' => [
                                'type' => 'text',
                            ],
                            'description' => [
                                'type' => 'text',
                            ],
                            'price' => [
                                'type' => 'integer',
                            ],
                            'rating' => [
                                'type' => 'float',
                            ],
                            'brand' => [
                                'type' => 'integer',
                            ],
                            'categories' => [
                                'type' => 'integer',
                            ],
                            'tags' => [
                                'type' => 'integer',
                            ],
                            'values' => [
                                'type' => 'nested',
                                'properties' => [
                                    'characteristic' => [
                                        'type' => 'integer'
                                    ],
                                    'value_string' => [
                                        'type' => 'keyword',
                                    ],
                                    'value_int' => [
                                        'type' => 'integer',
                                    ],
                                ]
                            ]
                        ]
                    ]
                ]
            ]
        ]);
    }

{
  "status" : 200,
  "name" : "Mortimer Toynbee",
  "cluster_name" : "elasticsearch",
  "version" : {
    "number" : "1.7.3",
    "build_hash" : "05d4530971ef0ea46d0f4fa6ee64dbc8df659682",
    "build_timestamp" : "2015-10-15T09:14:17Z",
    "build_snapshot" : false,
    "lucene_version" : "4.10.4"
  },
  "tagline" : "You Know, for Search"
}