# Unknown Fields in Index Patterns

**URL:** <https://discuss.elastic.co/t/unknown-fields-in-index-patterns/103766>\
**Category:** Kibana\
**Created:** [October 12, 2017, 4:12pm UTC](https://discuss.elastic.co/t/unknown-fields-in-index-patterns/103766 "2017-10-12T16:12:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![swagner](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@swagner](https://discuss.elastic.co/u/swagner)\
**Post date:** [October 12, 2017, 4:12pm UTC](https://discuss.elastic.co/t/unknown-fields-in-index-patterns/103766/1 "2017-10-12T16:12:47Z")

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We have removed documents from our index containing certain fields. These fields are no longer present in any remaining document. After refreshing and even deleting and recreating the index pattern in Kibana these field still shows up in the list of fields.  
Is the information cached somewhere? Is ES the problem?  
Thanks in advance.

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**Author:** ![Rajinia](https://avatars.discourse-cdn.com/v4/letter/r/d6d6ee/32.png) [@Rajinia](https://discuss.elastic.co/u/Rajinia)\
**Post date:** [October 13, 2017, 12:06am UTC](https://discuss.elastic.co/t/unknown-fields-in-index-patterns/103766/2 "2017-10-13T00:06:05Z")

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I think you need to refresh Kibana

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**Author:** ![Bargs](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bargs/32/5429_2.png) [@Bargs](https://discuss.elastic.co/u/Bargs)\
**Post date:** [October 13, 2017, 4:11pm UTC](https://discuss.elastic.co/t/unknown-fields-in-index-patterns/103766/3 "2017-10-13T16:11:09Z")

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The documents with those fields may be gone, but the fields probably still exist in your index mappings. Fields can't be deleted from an existing mapping, so you'll need to either delete and recreate your index or reindex.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 10, 2017, 4:11pm UTC](https://discuss.elastic.co/t/unknown-fields-in-index-patterns/103766/4 "2017-11-10T16:11:15Z")

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