owncloud role - change config.php after setup nextcloud

Hi all, I'm wondering if it's possible to change the debops generated config (config.php) for nextcloud after setup a nextcloud. While this works for me for the mail.config.php it doesn't for config.php. debops service/owncloud --tags role::owncloud:config --diff show's me the diff but does nothing. If I omit the --tags it does neigher anything. debops service/owncloud --tags role::owncloud:mail --diff show's me the diff and installs the new config. What's the recommanded way? Or what do I misssing? Thanks and regards Jan