"yunohost - Due to a bug, this migration will search for paths left writable by other users and fix these too large permissions. You might have some good reasons to grant write permissions to others on some paths, if so you should reapply your customization manually. After the migration, you can check the list of change in the log of the migration.
IMPORTANT: This migration may take several hours (or days) if you have a large number of files."

I like #yunohost for its universality, and I believe the creators did a good job. However, personally, I increasingly try to avoid using this application because you never know what will happen after an update. Today, I have literally three applications based on yunohost, but precisely because of this uncertainty, I am considering giving up using this project.