使用kibana中的graph功能时报了fielddata的错误，需要将fielddata改为ture，不知道怎么操作？

这个是grap的错误Error 400 Bad Request: Fielddata is disabled on text fields by default. Set fielddata=true on [host] in order 

to load fielddata in memory by uninverting the inverted index. Note that this can however use significant 

memory. Alternatively use a …
 
 
我看一下官网的解决方案
 

PUT my_index/_mapping/my_type { "properties": { "my_field": { "type": "text", "fielddata": true } } }
 
然后自己更加自己的对应的index，type，filed,进行修改，我的执行语句是：
 
PUT logstash-2017.09.12/_mapping/log
{
  "properties": {
    "message": { 
      "type":     "text",
      "fielddata": true
    }
  }
}
 
 
 
index ：logstash-2017.09.12     type  :  log      filed  : message   (这个是日志信息)
 
然后就报错了
 
信息：
 
{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "Mapper for [message] conflicts with existing mapping in other types:\n[mapper [message] has different [norms] values, cannot change from disable to enabled]"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "Mapper for [message] conflicts with existing mapping in other types:\n[mapper [message] has different [norms] values, cannot change from disable to enabled]"
  },
  "status": 400
 
 
 
本人是es的小白，刚刚搭建好环境，求大神提供解决方案, 怎样可以使用 graph功能达到这种效果