【ES异常】mapper [sortNum] of different type, current_type [long], merged_type [keyword]

Caused by: java.lang.IllegalArgumentException: mapper [sortNum] of different type, current_type [long], merged_type [keyword]
  at org.elasticsearch.index.mapper.FieldMapper.doMerge(FieldMapper.java:347)
  at org.elasticsearch.index.mapper.NumberFieldMapper.doMerge(NumberFieldMapper.java:1111)
  at org.elasticsearch.index.mapper.FieldMapper.merge(FieldMapper.java:333)
  at org.elasticsearch.index.mapper.FieldMapper.merge(FieldMapper.java:49)
  at org.elasticsearch.index.mapper.ObjectMapper.doMerge(ObjectMapper.java:476)
  at org.elasticsearch.index.mapper.RootObjectMapper.doMerge(RootObjectMapper.java:248)
  at org.elasticsearch.index.mapper.ObjectMapper.merge(ObjectMapper.java:448)
  at org.elasticsearch.index.mapper.RootObjectMapper.merge(RootObjectMapper.java:243)
  at org.elasticsearch.index.mapper.Mapping.merge(Mapping.java:88)
  at org.elasticsearch.index.mapper.DocumentMapper.merge(DocumentMapper.java:320)
  at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.applyRequest(MetaDataMappingService.java:267)
  at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.execute(MetaDataMappingService.java:230)
  at org.elasticsearch.cluster.service.ClusterService.executeTasks(ClusterService.java:634)
  at org.elasticsearch.cluster.service.ClusterService.calculateTaskOutputs(ClusterService.java:612)
  at org.elasticsearch.cluster.service.ClusterService.runTasks(ClusterService.java:571)
  at org.elasticsearch.cluster.service.ClusterService$ClusterServiceTaskBatcher.run(ClusterService.java:263)
  at org.elasticsearch.cluster.service.TaskBatcher.runIfNotProcessed(TaskBatcher.java:150)
  at org.elasticsearch.cluster.service.TaskBatcher$BatchedTask.run(TaskBatcher.java:188)
  at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:575)
  at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:247)
  at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:210)
  ... 3 more

{
  "properties": {
    "title": {
      "type": "text",
      "analyzer": "ik_max_word",
      "search_analyzer": "ik_max_word"
    },
    "keywords": {
      "type": "text",
      "analyzer": "ik_max_word",
      "search_analyzer": "ik_max_word"
    },
    "description": {
      "type": "text",
      "analyzer": "ik_max_word",
      "search_analyzer": "ik_max_word"
    },
    "url": {
      "type": "keyword"
    },
    "imageUrl": {
      "type": "keyword"
    },
    "siteId": {
      "type": "long"
    },
    "siteType": {
      "type": "keyword"
    },
    "inputdate": {
      "type": "date"
    },
    "popularity": {
      "type": "long"
    },
    "district": {
      "type": "keyword"
    },
    "community": {
      "type": "text"
    },
    "sortNum": {
      "type": "long"
    }
  }
}

@Data
@Document(indexName = "hot_estate", type = "hot_estate")
@Mapping(mappingPath = "hotEstateIndex.json")
public class HotEstateDocument{
    @Id
    private String contentId;
    /**
     * 标题
     */
    private String title;
    /**
     * 关键字
     */
    private String keywords;
    /**
     * 描述
     */
    private String description;
    /**
     * 内容url
     */
    private String url;
    /**
     * 封面多图
     */
    private String imageUrl;
    /**
     * 发布时间
     */
    private Date inputdate;
    /**
     * 站点id
     */
    private Long siteId;
    /**
     * 站点类型
     */
    private String siteType;
    /**
     * 人气
     */
    private Integer popularity;
    /**
     * 排序号
     */
    private Integer sortNum;
    /**
     * 行政区
     */
    private String district;
    /**
     * 小区
     */
    private String community;
    public static HotEstateDocument content2Document(TCmsContentVo content) {
        HotEstateDocument hotEstateDocument=new HotEstateDocument();
        BeanUtils.copyProperties(content,hotEstateDocument);
        return hotEstateDocument;
    }
}