# About "Rolling upgrades" manual
**URL:** https://discuss.elastic.co/t/about-rolling-upgrades-manual/119284
**Category:** Elasticsearch
**Created:** [February 9, 2018, 5:39pm UTC](https://discuss.elastic.co/t/about-rolling-upgrades-manual/119284 "2018-02-09T17:39:07Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@snuffkin](https://discuss.elastic.co/u/snuffkin)
#### Post date: [February 9, 2018, 5:39pm UTC](https://discuss.elastic.co/t/about-rolling-upgrades-manual/119284/1 "2018-02-09T17:39:07Z")
I have a question abont "Rolling upgrades" manual of Elasticsearch Reference.
In version 6.0+, "cluster.routing.allocation.enable" is set to "none" with " **persistent**".
[https://www.elastic.co/guide/en/elasticsearch/reference/6.2/rolling-upgrades.html](https://www.elastic.co/guide/en/elasticsearch/reference/6.2/rolling-upgrades.html)
But in version 5.6, "cluster.routing.allocation.enable" is set to "none" with " **transient**".
[https://www.elastic.co/guide/en/elasticsearch/reference/5.6/rolling-upgrades.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.6/rolling-upgrades.html)
Does anyone know why this description was changed?
I think version 5.6 manual is correct.
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### Author:  [@johtani](https://discuss.elastic.co/u/johtani)
#### Post date: [February 10, 2018, 12:07am UTC](https://discuss.elastic.co/t/about-rolling-upgrades-manual/119284/2 "2018-02-10T00:07:23Z")
See : [https://github.com/elastic/elasticsearch/issues/27860](https://github.com/elastic/elasticsearch/issues/27860)
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### Author:  [@snuffkin](https://discuss.elastic.co/u/snuffkin)
#### Post date: [February 10, 2018, 4:28am UTC](https://discuss.elastic.co/t/about-rolling-upgrades-manual/119284/3 "2018-02-10T04:28:12Z")
Thanks!
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 10, 2018, 4:29am UTC](https://discuss.elastic.co/t/about-rolling-upgrades-manual/119284/4 "2018-03-10T04:29:37Z")
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