Hello everyone! Thanks for reading this 
My YunoHost server
**Hardware: laptop at home
YunoHost version: 4.3.4.1 (stable)
I have access to my server : Through SSH | through the webadmin | direct access via keyboard / screen
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no
Description of my issue
I have an error when I try to upgrade any app, same message every time:
https://paste.yunohost.org/raw/foqevuniqa
/mnt/retroarch/SAVES/bnw-ynhbackup is a folder on an external USB drive, where I store my backups.
I run two scripts via crontab, one for email backup, and one for complete backup. I can share the complete scripts if needed, but the main command for creating the backup are:
yunohost backup create --system data_mail -o /mnt/retroarch/SAVES/bnw-ynhbackup/mail
yunohost backup create -o /mnt/retroarch/SAVES/bnw-ynhbackup/complete
These scripts will also remove the oldest backup file because I don’t want to have my drive full in a few months.
And from what I understand, the app upgrade script is checking if one of these file is still there, but obviously it has been deleted already.
How can I avoid this?
FileNotFoundError: [Errno 2] No such file or directory: ‘/mnt/retroarch/SAVES/bnw-ynhbackup/mail/20210917-012005.tar’