ES4-1节创建索引的时候，报以下错误？

Question

{

    "error": {

        "root_cause": [

            {

                "type": "illegal_argument_exception",

                "reason": "Rejecting mapping update to [people] as the final mapping would have more than 1 type: [woman, man]"

            }

        ],

        "type": "illegal_argument_exception",

        "reason": "Rejecting mapping update to [people] as the final mapping would have more than 1 type: [woman, man]"

    },

    "status": 400

}