# 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:** 3\
**Page:** 1

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**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, 8:52pm UTC](https://discuss.elastic.co/t/drop-previous-csv-lines-if-field-value-already-exists/293947/1 "2022-01-10T20:52:35Z")

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![image](https://us1.discourse-cdn.com/elastic/original/3X/b/b/bb2d0df239cdb56ab313dfaaf41f4dd0e2e29721.png)

I'd like to know if there is a way to drop/overwrite previous csv documents if a field value already exists.

In my screenshot above globalCallID is what I want to match on.

Take globalCallID\_callID number 263504...

That document would only exist in Elasticsearch as:

![image](https://us1.discourse-cdn.com/elastic/original/3X/7/1/71191d4d011fa1e40fb0a849d91d69d6d991875e.png)

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<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")

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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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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 7, 2022, 8:56pm UTC](https://discuss.elastic.co/t/drop-previous-csv-lines-if-field-value-already-exists/293947/3 "2022-02-07T20:56:07Z")

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