Error on update the instance

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Thank you for your help! The output of the command

sudo apt update
Hit:1 http://deb.debian.org/debian bookworm InRelease
Get:2 http://security.debian.org/debian-security bookworm-security InRelease [48.0 kB]                          
Get:3 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]                                         
Hit:5 http://archive.raspberrypi.org/debian bookworm InRelease                                                  
Get:6 https://dl.yarnpkg.com/debian stable InRelease                                                            
Hit:7 https://packages.sury.org/php bookworm InRelease                                                 
Err:6 https://dl.yarnpkg.com/debian stable InRelease                               
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23E7166788B63E1E
Hit:4 https://forge.yunohost.org/debian bookworm InRelease
Reading package lists... Done                                                                                   
W: http://deb.debian.org/debian/dists/bookworm/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/yarn.gpg are ignored as the file has an unsupported filetype.
W: http://security.debian.org/debian-security/dists/bookworm-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/yarn.gpg are ignored as the file has an unsupported filetype.
W: http://deb.debian.org/debian/dists/bookworm-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/yarn.gpg are ignored as the file has an unsupported filetype.
W: http://archive.raspberrypi.org/debian/dists/bookworm/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/yarn.gpg are ignored as the file has an unsupported filetype.
W: GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23E7166788B63E1E
E: The repository 'https://dl.yarnpkg.com/debian stable InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: https://packages.sury.org/php/dists/bookworm/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/yarn.gpg are ignored as the file has an unsupported filetype.

I would like to bring some precisions that can help for fixing my issue. Initially I had some troubles with the free space. So I did some cleanup to free space. I run these commands

sudo apt clean
sudo apt autoclean
sudo rm -rf /var/cache/*
sudo journalctl --vacuum-size=200M
sudo find /var/log -type f -name "*.log" -exec truncate -s 0 {} \;

The cleanup was to deep unfortunatly… It generates the error on update and an error to connect to the user web interface (other post) :

And finally, this morning I received this email from the server :œ


/etc/cron.daily/yunohost-fetch-apps-catalog:
WARNING Failed to check pre-upgrade notifications for cockpit : [Errno 2] No such file or directory: '/var/cache/yunohost/app_tmp_work_dirs/app_whuxcmy9'
WARNING Failed to check pre-upgrade notifications for nextcloud : [Errno 2] No such file or directory: '/var/cache/yunohost/app_tmp_work_dirs/app_vh_jsdue'

Thanks a lot for your help!