How to set different types for the same fields under the same index and different type in Elasticsearch?

when Elasticsearch creates mapping, it will report an error if the same field name of different type is set to different type, so how to solve this situation?

request a connection

 PUT  http://localhost:9200/new

parameters are as follows:

{
    "max_result_window": "1000000",
    "_source" : {
        "enabled": true
      },
      "_all" : {
        "enabled": false
      },
    "mappings": {
         "type1": {
          "properties": {
            "@timestamp" : {
              "type" : "date"
            },
            "@version" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            },
            "create_time" : {
              "index": "not_analyzed",
              "type" : "long"
            }
          }
        },
        "type2": {
          "properties": {
            "@timestamp" : {
              "type" : "date"
            },
            "@version" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            },
            "create_time" : {
              "index": "not_analyzed",
              "type" : "date"
            }
          }
        }
    }
}

request result:

 {
    "error": {
        "root_cause": [
            {
                "type": "illegal_argument_exception",
                "reason": "mapper [create_time] cannot be changed from type [date] to [long]"
            }
        ],
        "type": "illegal_argument_exception",
        "reason": "mapper [create_time] cannot be changed from type [date] to [long]"
    },
    "status": 400
}