Forum root is set to access lvl 0 - can't change to public

Hi - I’m just having an issue here with my main forum index page being set to level 0+ access, when I actually didn’t specify it to have any restrictions. I want users to be able to see the content but need to register to post / access certain content. I also want all of my index/pages to be crawled by google, so having the forum root visible is important.

I can’t see anything on the restrictions section specifying the root index to be restricted, and the page itself is not restricted either (by the widget in the editor). Am I missing something here?