Drop previous csv lines if field value already exists

[Micah_Barsness]

Would it be possible to do something similar to this? Logstash - how to overwrite document instead of creating new ones

output {
    elasticsearch {
        host => 'your es host'
        action => 'update'
        document_id => "%{[globalCallID_callId]}"
        index => 'your index name
    }
}