The index validation script flags items that have a URL slug that doesn't match the hub name. For instances where the item does not have a data page (often externally-hosted data), I think we can auto-fix the URL by just applying the non-matched slug.
For example, here the Cattle Guards layer has a "-1" in the URL. Currently the index validation script identifies this, but the index uses the URL without the "-1", which doesn't work. If it simply used the "-1" URL instead, it would work.
