# Elasticsearch transform configuration must specify exactly 1 function error

**URL:** <https://discuss.elastic.co/t/elasticsearch-transform-configuration-must-specify-exactly-1-function-error/355165>\
**Category:** Elasticsearch\
**Created:** [March 11, 2024, 1:48pm UTC](https://discuss.elastic.co/t/elasticsearch-transform-configuration-must-specify-exactly-1-function-error/355165 "2024-03-11T13:48:18Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![rvadiga](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rvadiga/32/102601_2.png) [@rvadiga](https://discuss.elastic.co/u/rvadiga)\
**Post date:** [March 11, 2024, 1:48pm UTC](https://discuss.elastic.co/t/elasticsearch-transform-configuration-must-specify-exactly-1-function-error/355165/1 "2024-03-11T13:48:18Z")

</div>

Hello Team,

I have a scenario in Elasticsearch transform where I need to ignore all duplicate items from the source index and apply few aggregation after ignore the duplicate documents.  
Could you please suggest any best design for this issue??

Thank you in advance  
Regards  
Venkatesh

---

<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:** [April 8, 2024, 1:49pm UTC](https://discuss.elastic.co/t/elasticsearch-transform-configuration-must-specify-exactly-1-function-error/355165/2 "2024-04-08T13:49:03Z")

</div>

Closed on April 8, 2024, 1:49pm UTC

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.