That’s the easiest way…
I have an empty one if you want to use it. This is a link to my Google Drive… it’s a file called “metadata.db.empty”… As the name implies, it is an empty metadata file. Download it, dump the empty extension, put it in your /books directory then use /books for your database location, and log in with the default credentials
https://drive.google.com/file/d/1zY07g_V9Yxx5p7YCIUXX1CSxVLJWd2a8/view?usp=sharing
I’ve given this to folks on the OMV forum a few times to help them around this issue… so I’m not trying to pull any games with you…