# Drop previous csv lines if field value already exists

**URL:** <https://discuss.elastic.co/t/drop-previous-csv-lines-if-field-value-already-exists/293947>\
**Category:** Logstash\
**Created:** [January 10, 2022, 8:52pm UTC](https://discuss.elastic.co/t/drop-previous-csv-lines-if-field-value-already-exists/293947 "2022-01-10T20:52:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![Micah\_Barsness](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/micah_barsness/32/83318_2.png) [@Micah\_Barsness](https://discuss.elastic.co/u/Micah_Barsness)\
**Post date:** [January 10, 2022, 8:55pm UTC](https://discuss.elastic.co/t/drop-previous-csv-lines-if-field-value-already-exists/293947/2 "2022-01-10T20:55:38Z")

</div>

Would it be possible to do something similar to this? [Logstash - how to overwrite document instead of creating new ones](https://discuss.elastic.co/t/logstash-how-to-overwrite-document-instead-of-creating-new-ones/191456)

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

```

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