Come, come, now, my good people! "Errata" is the list of errors, which usually INCLUDES the corrigenda (or corrections). While it SHOULD, more properly be "Errata & Corrigenda", it is usually abbreviated to "Errata", even if incorrectly.
Obviously, WotC meant "...includes the Errata & Corrigenda", or the list of errors AND CORRECTIONS. (Posting a list of known errors, without corrections, is obviously not something they would advertise!)
So, we know that this edition includes CORRECTIONS to the previous errata. Nothing more to see, here, folks! Move along, move along!