This is the same INUM, so it looks very much like a hard link.
I’m not 100% sure, but from what I read, it should be safe, to delete a hard link without loosing the data. I’d do a backup anyway.
Here is a Howto move the data directory after the installation:
However, if you just started the installation and there is no user data yet, I would start from the scratch. If you might loose data, you could still
- backup all the user data
- backup your config file /sharedfolders/www/nextcloud/config/config.php
- re-create a fresh directory structure
- copy the content of https://download.nextcloud.com/server/releases/nextcloud-14.0.3.zip to your NC folder (/sharedfolders/www/nextcloud/)
- copy the backup of your user data to new data folder (I suggest /sharedfolders/ncdata/ then)
- restore your config.php to /sharedfolders/www/nextcloud/config/ (make adaptions to the config file according to the howto regarding the moved data directory
- perform the steps from the howto
Afterwards you should be able to login in again, see all your files and perform the upgrade successfully.