ElasticSearch7.9.1, ik 分词无法插入数据

zhuban大佬：
elasticsearch7.9.1,ik 分词也是 7.9.1

前两步没有问题,但是插入数据报错 报错:Mapper 冲突

求解,非常感谢!

1. #1.创建 index
2. PUT /news
4. #2.设置分词
5. PUT /news/_mapping
6. {
7.   "properties": {
8.     "content": {
9.       "type": "text",
10.       "analyzer": "ik_max_word",
11.       "search_analyzer": "ik_max_word"
12.     }
13.   }
14. }
16. #3.插入数据
17. PUT gd/gd/1iNC
18. {
19.   "title": "这里是标题",
20.   "content": "这里是内容"
21. }
23. DELETE /news

第三步插入数据报错:

1. {
2.   "error" : {
3.     "root_cause" : [
4.       {
5.         "type" : "illegal_argument_exception",
6.         "reason" : "Mapper for [content] conflicts with existing mapping:\n[mapper [content] has different [analyzer]]"
7.       }
8.     ],
9.     "type" : "illegal_argument_exception",
10.     "reason" : "Mapper for [content] conflicts with existing mapping:\n[mapper [content] has different [analyzer]]"
11.   },
12.   "status" : 400
13. }