Can't create indices

Elastic Stack Logstash
3

i actually don't know what is the data stream in elasticsearch.In elk 7.8 version i didn't see this error and when i upgraded to 7.9 version it can't show me indices although it is showing but it is hidden.
now it is working
i changed my pipeline file

output {
 if[agent][type]=="packetbeat"
 {
if[type]=="flow"
   {
    elasticsearch {
    hosts => ["coordinate2:9200"]
    manage_template => false
    index => "logs-packetbeat-flow-%{+YYYY.MM.dd}"
    action => "create"
  }
  }
}
}
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