# Create index mapping for dataset with large features

**URL:** <https://discuss.elastic.co/t/create-index-mapping-for-dataset-with-large-features/184830>\
**Category:** Elasticsearch\
**Created:** [June 8, 2019, 9:07am UTC](https://discuss.elastic.co/t/create-index-mapping-for-dataset-with-large-features/184830 "2019-06-08T09:07:41Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [June 8, 2019, 12:30pm UTC](https://discuss.elastic.co/t/create-index-mapping-for-dataset-with-large-features/184830/12 "2019-06-08T12:30:24Z")

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That's because you have already something defined in your index. Drop it.

If you still have problems please provide a full recreation script as described in [About the Elasticsearch category](https://discuss.elastic.co/t/about-the-elasticsearch-category/21). It will help to better understand what you are doing. Please, try to keep the example as simple as possible.

A full reproduction script will help readers to understand, reproduce and if needed fix your problem. It will also most likely help to get a faster answer.

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_[View the full topic](https://discuss.elastic.co/t/create-index-mapping-for-dataset-with-large-features/184830)._