Automatically created pages from the keys in block properties?

Apparently upon defining some properties of a page (in the first block), new pages named after the keys of those properties are automatically created.

Correct me if I am wrong, but it looks like a new behavior that must have been introduced very recently (I use the latest stable release 0.7.9). But maybe it was always like that and I kept overlooking it, including overlooking any mention of this behavior in the documentation.

Now my graph is cluttered with pages named like place, short-title, access-date and pages, mostly coming from pages created upon import from Zotero.

I am wondering if this is a desirable behavior. Is it really useful for most users? Is there any possibility to switch it off?