Backup-encryption-key not working

I am trying to restore a backup on a new server. However, this is not working.

In the old server config, there is a line called “encryption_key” but in the new one, it is called “backup_encryption_key”. I used the encryption key of the old server but that one is not working.

As a solution I tried the --backup-encryption-key parameter from the docs:
https://frappeframework.com/docs/user/en/guides/basics/how-to-enable-backup-encry192.168.56.1192.168.56.1

However, this results in the following error: Error: no such option: --backup-encryption-key

btw, the setting backup encryption key is disabled, so I thought I would not have to decrypt anything.