Editable slug when using 11ty

Hi, I’m using 11ty and Netlify Visual Editor to edit pages/posts. I want to make the slug editable so that the filename is updated, e.g. test.md renames to newslug.md when the slug is changed.

By default I get:
You can't change the slug. Contact your developer to enable stableId-based files.

But I can’t find any docs on this?

Doesn’t sounds like a Netlify issue. Have you tried contacting your developer?