# Cert-manager upgrade and restore

**URL:** <https://forums.suse.com/t/cert-manager-upgrade-and-restore/16502>\
**Category:** General\
**Created:** [February 5, 2020, 12:32am UTC](https://forums.suse.com/t/cert-manager-upgrade-and-restore/16502 "2020-02-05T00:32:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jbartlett](https://avatars.discourse-cdn.com/v4/letter/j/df705f/32.png) [@jbartlett](https://forums.suse.com/u/jbartlett)\
**Post date:** [February 5, 2020, 12:32am UTC](https://forums.suse.com/t/cert-manager-upgrade-and-restore/16502/1 "2020-02-05T00:32:26Z")

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I am upgrading cert-manager from the 0.9.1 release to 0.12.0. I have read the docs at Rancher as well as the upgrade guide at [cert-manger.io](http://cert-manger.io). The cert-manager guide says to back up your issuer/cert resources into a file and update the apiVersion as required, no issues there. However, when you re-install cert-manager, it creates a new cert-manager-webhook-ca certificate. Should I really be restoring the old one from my backup?

The guide for a 0.9.0 to 0.10.0 upgrade says you should delete those resources, as the bootstrap process has changed, so I don’t think I want to do that.