关于ES出现Fielddata is disabled on text fields by default的错误

跟着ElasticSearch官网的文档学习，执行以下代码

GET /megacorp/employee/_search
{
  "size":0,
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests"
      }
    }
  }
}

报错如下

{
        "type": "illegal_argument_exception",
        "reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [interests] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}

百度查到需要在aggs前执行以下代码

PUT megacorp/_mapping/employee/
{
  "properties": {
    "interests":{
      "type":"text",
      "fielddata": true
    }
  }
}

但还是不行，继续报错

{
        "type": "illegal_argument_exception",
        "reason": "Types cannot be provided in put mapping requests, unless the include_type_name par