# Unable to upgrade to Debian Buster and Yunohost 4x

**URL:** https://forum.yunohost.org/t/unable-to-upgrade-to-debian-buster-and-yunohost-4x/14804
**Category:** Support
**Tags:** english
**Created:** [March 2, 2021, 6:28am UTC](https://forum.yunohost.org/t/unable-to-upgrade-to-debian-buster-and-yunohost-4x/14804 "2021-03-02T06:28:15Z")
**Posts on this page:** 1
**Showing post:** 9

<div class="post-metadata">

### Author: ![Aleks](https://forum.yunohost.org/user_avatar/forum.yunohost.org/aleks/32/1704_2.png) [@Aleks](https://forum.yunohost.org/u/Aleks)
#### Post date: [March 3, 2021, 1:25am UTC](https://forum.yunohost.org/t/unable-to-upgrade-to-debian-buster-and-yunohost-4x/14804/9 "2021-03-03T01:25:15Z")

</div>

```auto
2021-03-02 19:36:46,912: WARNING - /dev/disk/by-id/ata-KINGSTON_SA400S37240G_50026B778253D15C does not exist, so cannot grub-install to it!
2021-03-02 19:36:46,913: WARNING - You must correct your GRUB install devices before proceeding:
2021-03-02 19:36:46,913: WARNING - 
2021-03-02 19:36:46,914: WARNING - DEBIAN_FRONTEND=dialog dpkg --configure grub-pc
2021-03-02 19:36:46,914: WARNING - dpkg --configure -a
[...]
2021-03-02 19:38:59,039: WARNING - Errors were encountered while processing:
2021-03-02 19:38:59,040: WARNING - grub-pc

```

That error sounds similar to [Update Errors, also on fix commands!](https://forum.yunohost.org/t/update-errors-also-on-fix-commands/14496)

You should run `sudo DEBIAN_FRONTEND=text dpkg --configure -a` and probably select /dev/sda … (though difficult to be 100% sure)

Also please run `rm /etc/apt/sources.list.d/sury.list` as advised previously to get rid of a bunch of warnings …

---

_[View the full topic](https://forum.yunohost.org/t/unable-to-upgrade-to-debian-buster-and-yunohost-4x/14804)._