# Will indices created on ES2 and upgraded to ES5 be able to be upgraded by ES6?
**URL:** https://discuss.elastic.co/t/will-indices-created-on-es2-and-upgraded-to-es5-be-able-to-be-upgraded-by-es6/85294
**Category:** Elasticsearch
**Created:** [May 10, 2017, 5:55pm UTC](https://discuss.elastic.co/t/will-indices-created-on-es2-and-upgraded-to-es5-be-able-to-be-upgraded-by-es6/85294 "2017-05-10T17:55:06Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mpereira](https://discuss.elastic.co/u/mpereira)
#### Post date: [May 10, 2017, 5:55pm UTC](https://discuss.elastic.co/t/will-indices-created-on-es2-and-upgraded-to-es5-be-able-to-be-upgraded-by-es6/85294/1 "2017-05-10T17:55:07Z")
The title basically. We have indices created on ES2 that were upgraded in-place by ES5 when we bumped the version. Would these be able to be read and upgraded by ES6 or will we need to reindex?
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [May 10, 2017, 7:07pm UTC](https://discuss.elastic.co/t/will-indices-created-on-es2-and-upgraded-to-es5-be-able-to-be-upgraded-by-es6/85294/2 "2017-05-10T19:07:58Z")
You will have to reindex. I just did it while testing 6.0.0-alpha1.
In 5.4, I used the \_reindex API to reindex my old .kibana index then I was able to start 6.0.
HTH
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 7, 2017, 7:22pm UTC](https://discuss.elastic.co/t/will-indices-created-on-es2-and-upgraded-to-es5-be-able-to-be-upgraded-by-es6/85294/3 "2017-06-07T19:22:23Z")
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