How to create a backup excluding a home

What type of hardware are you using: Old laptop or computer
What YunoHost version are you running: 11.2.3
How are you able to access your server: SSH

Describe your issue

I’m trying to create a backup, but I wish to exclude a /home/XXX.

I did not find any option for that, so I decided to exclude backuping the home. But I still do not understand how to do this.
I found that I can pass options to --system but I do not understand what and how

Share relevant logs or error messages

$ sudo yunohost backup create --system conf_ldap,conf_manually_modified_files,conf_ynh_certs,conf_ynh_settings,data_mail,data_multimedia
Error: The backup hook 'conf_ldap,conf_manually_modified_files,conf_ynh_certs,conf_ynh_settings,data_mail,data_multimedia' is unknown
Info: The operation 'Create a backup archive' could not be completed. Please share the full log of this operation using the command 'yunohost log share 20260308-195833-backup_create' to get help
Error: Nothing to save

Hi,
You can use a .nobackup file :

The command line isn’t correct, you must use a space and not a comma between elements to backup.