elasticsearch 聚合时 类型转换错误

   "aggs":{
       "level2":{   
          "terms":{
             "field":"inp_type"
          }
       }
    }

{
  "error": "ClassCastException[org.elasticsearch.search.aggregations.bucket.terms.StringTerms$Bucket cannot be cast to org.elasticsearch.search.aggregations.bucket.terms.LongTerms$Bucket]",
  "status": 500
}

 "aggs":{
       "level2":{   
          "terms":{
             "script":"doc[‘inp_type‘].value"
          }
       }
    }