# Update mappings on index

**URL:** <https://discuss.elastic.co/t/update-mappings-on-index/273299>\
**Category:** Elasticsearch\
**Created:** [May 18, 2021, 2:05pm UTC](https://discuss.elastic.co/t/update-mappings-on-index/273299 "2021-05-18T14:05:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Cesidio\_DiBenedetto](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cesidio_dibenedetto/32/78869_2.png) [@Cesidio\_DiBenedetto](https://discuss.elastic.co/u/Cesidio_DiBenedetto)\
**Post date:** [May 18, 2021, 2:05pm UTC](https://discuss.elastic.co/t/update-mappings-on-index/273299/1 "2021-05-18T14:05:49Z")

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If I add a few new fields in my index but are not currently being populated because our caching job hasn't been updated to match, will that break current inserts/updates on that index?

Edit: Basically added a few new "float" fields.

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 19, 2021, 1:14am UTC](https://discuss.elastic.co/t/update-mappings-on-index/273299/2 "2021-05-19T01:14:58Z")

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If you have the mapping for the field, but there are no documents using it, that's not going to cause issues. They will just hold null values for that field.

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**Author:** ![Cesidio\_DiBenedetto](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cesidio_dibenedetto/32/78869_2.png) [@Cesidio\_DiBenedetto](https://discuss.elastic.co/u/Cesidio_DiBenedetto)\
**Post date:** [May 19, 2021, 1:03pm UTC](https://discuss.elastic.co/t/update-mappings-on-index/273299/3 "2021-05-19T13:03:09Z")

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Thank you, Mark, for the timely response. Appreciate it.

-Sid

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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:** [June 16, 2021, 1:03pm UTC](https://discuss.elastic.co/t/update-mappings-on-index/273299/4 "2021-06-16T13:03:30Z")

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