How to make Nextcloud apps (Collectives, Notes, Bookmarks, Cookbook) recognize existing files after AIO reinstall?

[vawaver]

So I finally solved it.
For those who encounter this problem, I have written instructions on this link.

Restoring Collectives content after a clean reinstall in Nextcloud AIO

Restoring Collectives content after a clean reinstall in Nextcloud AIO This guide describes how to fix an issue that can occur after a clean reinstallation of Nextcloud AIO (Docker environment), when the Collectives app is restored only from a manual file backup of the original “Collectives” folder, instead of a full system backup made via BorgBackup. After such a reinstall, you may find that all your Markdown files are still physically present inside the Collectives folder, but …