[knot-dns-users] db.storage

Hi, my knot installation (3.0.5) gives me this notice: notice: config, non-default 'template[default].storage' detected, please configure also 'db.storage' to avoid compatibility issues with future versions I have searched the docs to find out what I have to do, but did not find any specific information. Can you give me a hint what needs to be done here? Thanks a lot, Thomas