# Certificate issue when upgrading server from 2.6 to 3.2.1

**URL:** <https://hub.mender.io/t/certificate-issue-when-upgrading-server-from-2-6-to-3-2-1/4874>\
**Category:** General Discussions\
**Created:** [April 20, 2022, 4:52am UTC](https://hub.mender.io/t/certificate-issue-when-upgrading-server-from-2-6-to-3-2-1/4874 "2022-04-20T04:52:33Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![spratesi](https://avatars.discourse-cdn.com/v4/letter/s/eb8c5e/32.png) [@spratesi](https://hub.mender.io/u/spratesi)\
**Post date:** [April 22, 2022, 9:04am UTC](https://hub.mender.io/t/certificate-issue-when-upgrading-server-from-2-6-to-3-2-1/4874/5 "2022-04-22T09:04:41Z")

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I think this is related [Is key rotation made mandatory by 3.1 update?](https://hub.mender.io/t/is-key-rotation-made-mandatory-by-3-1-update/4616)

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_[View the full topic](https://hub.mender.io/t/certificate-issue-when-upgrading-server-from-2-6-to-3-2-1/4874)._