# Upgrade from v39 to v40 failed with an error 404

**URL:** <https://universal-blue.discourse.group/t/upgrade-from-v39-to-v40-failed-with-an-error-404/2099>\
**Category:** Bazzite\
**Created:** [June 4, 2024, 7:53am UTC](https://universal-blue.discourse.group/t/upgrade-from-v39-to-v40-failed-with-an-error-404/2099 "2024-06-04T07:53:52Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![mel226](https://yyz2.discourse-cdn.com/free1/user_avatar/universal-blue.discourse.group/mel226/32/1577_2.png) [@mel226](https://universal-blue.discourse.group/u/mel226)\
**Post date:** [June 4, 2024, 1:38pm UTC](https://universal-blue.discourse.group/t/upgrade-from-v39-to-v40-failed-with-an-error-404/2099/2 "2024-06-04T13:38:12Z")

</div>

Try this, from the [3.0 announcement post](https://universal-blue.discourse.group/t/announcing-bazzite-3-0/1218#if-it-fails-due-to-a-404-for-a-copr-repo-6):

```auto
sudo rm /etc/yum.repos.d/_copr_sentry-kernel-ba.repo

```

Then try to update again.

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_[View the full topic](https://universal-blue.discourse.group/t/upgrade-from-v39-to-v40-failed-with-an-error-404/2099)._