Board Thread:Support Requests - Community Management/@comment-31246436-20161018153158/@comment-31246436-20161018161617

Its namespace number is 420. And I just talked with the admin of the site and he said this:

[T]he Layer namespace is used for an [extension] that was [enabled] on here a while back, a [maping] one we never removed sort of obscure now for most wikis and [at this] point so just an [extension] space