Messed up calendar(s)

[Bernie_O]

@Talus_Unheil

I guess I have to restore the backup as a new database first and then adjust the “config.php” accordingly - but honestly I don’t know if this is right and how I do such restore.

Exactly. Have a look at this post for how to accomplish that:

Calcardbackup: bash script to backup Nextcloud calendars and addressbooks as *.ics/*.vcf files

I can‘t see that, but you said, that the script is pulling data from the running instance and my script is using the credentials from config.php, so obviously your config.php is pointing to the database of your new installation. Good you have a database dump. It should be not a big problem to restore the calendars. Replace [DBPASSWORD] with the according value in config.php from your old installation and make sure that there is no space between -p and [DBPASSWORD]: create a new database (e.g…