Im using the Below JDBC code in Logstash for updating the already existing index in Elasticsearch, without duplicating rows or adding the updated row as another new row.
Versions: Elasticsearch, Logstash and Kibana are v7.1.0.

```
input {
    jdbc {
        jdbc_connection_string => "jdbc:sqlserver://DB01:1433;databasename=testdb;integratedSecurity=true"
        jdbc_driver_class =>  "com.microsoft.sqlserver.jdbc.SQLServerDriver"
    jdbc_driver_library => "C:\Program Files\sqljdbc_6.2\enu\mssql-jdbc-6.2.2.jre8.jar"
        jdbc_user => nil
        statement => "SELECT * from data WHERE updated_on > :sql_last_value ORDER BY updated_on"
    use_column_value =>true
        tracking_column =>updated_on
        tracking_column_type => "timestamp"
    }
}
output {
          elasticsearch { hosts => ["localhost:9200"] 
        index => "datau" 
        action=>update
            document_id => "%{id}"
            doc_as_upsert =>true}
          stdout { codec => rubydebug }
       }

```

when i run the above in logstash (logstash -f myfile.conf)
the below error appars.

```
[2019-08-21T10:46:33,864][ERROR][logstash.outputs.elasticsearch] Failed to insta ll template. {:message=>"Got response code '400' contacting Elasticsearch at URL  'http://localhost:9200/_template/logstash'", :class=>"LogStash::Outputs::Elasti cSearch::HttpClient::Pool::BadResponseCodeError", :backtrace=>["D:/ELK 6.4.0/log stash-6.4.0/logstash-6.4.0/vendor/bundle/jruby/2.3.0/gems/logstash-output-elasti csearch-9.2.0-java/lib/logstash/outputs/elasticsearch/http_client/manticore_adap ter.rb:80:in `perform_request'", "D:/ELK 6.4.0/logstash-6.4.0/logstash-6.4.0/ven dor/bundle/jruby/2.3.0/gems/logstash-output-elasticsearch-9.2.0-java/lib/logstas h/outputs/elasticsearch/http_client/pool.rb:291:in `perform_request_to_url'"...

```

Where am i gong wrong?