Could not index event to Elasticsearch, mapper [geoip.location] of different type

Elastic Stack Elasticsearch
1

Hi All
I have configured logstash and elasticsearch v7.8.
This is the logstash part

    geoip {
        source => "[iis][access][client_ip]"
    }

Index template:

GET /_template/iis

{
  "iis" : {
    "order" : 0,
    "version" : 60001,
    "index_patterns" : [
      "iis-*"
    ],
    "settings" : {
      "index" : {
        "number_of_shards" : "1",
        "number_of_replicas" : "0",
        "refresh_interval" : "5s"
      }
    },
    "mappings" : {
      "dynamic_templates" : [
        {
          "message_field" : {
            "path_match" : "message",
            "mapping" : {
              "norms" : false,
              "type" : "text"
            },
            "match_mapping_type" : "string"
          }
        },
        {
          "string_fields" : {
            "mapping" : {
              "norms" : false,
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "ignore_above" : 256,
                  "type" : "keyword"
                }
              }
            },
            "match_mapping_type" : "string",
            "match" : "*"
          }
        }
      ],
      "properties" : {
        "@timestamp" : {
          "type" : "date"
        },
        "geoip" : {
          "dynamic" : true,
          "properties" : {
            "ip" : {
              "type" : "ip"
            },
            "latitude" : {
              "type" : "half_float"
            },
            "location" : {
              "type" : "geo_point"
            },
            "longitude" : {
              "type" : "half_float"
            }
          }
        },
        "@version" : {
          "type" : "keyword"
        }
      }
    },
    "aliases" : { }
  }
}

Logstash logs:

[2020-09-02T09:53:22,106][WARN ][logstash.outputs.elasticsearch][main][e259a9c61a106fc2c0d1e50f28fad160c27a1537f119152edc21384c300f32c1] Could not index event to Elasticsearch. {:status=>400, :action=>["index", {:_id=>nil, :_index=>"iis-2020.09.02", :routing=>nil, :_type=>"%{type}"}, #<LogStash::Event:0x7397c590>], :response=>{"index"=>{"_index"=>"iis-2020.09.02", "_type"=>"%{type}", "_id"=>"Hqw8TnQBA0raPCFaMvi1", "status"=>400, "error"=>{"type"=>"illegal_argument_exception", "reason"=>"mapper [geoip.location] of different type, current_type [geo_point], merged_type [ObjectMapper]"}}}}

image

Can someone let me know what am i doing wrong here?