A friend suggested I use Nextcloud in my company. We started using and liked it a lot.
But now we have a problem … which is conflicting files when 2 or more users are using it.
It can be normal when two users are editing a file independently, then you have to check manually what was changed since you started to edit the file.
It can also happen, when file-locking is not working properly. To have a good working file locking, it’s recommended to use redis as filelocking cache.
For more details you have to provide more information and also check the logs when the conflict is happening.
If you directly use webdav and not the sync client (sync client creates a local copy), it could work with the file locking. On the other hand, if you want collaborative editing, you should take a look at collabora or only office.