If you are referring to the footprint of what used to be T6, that's not an error, of course, and it has been already discussed several times on the forum, for example here:
http://www.fsdreamteam.com/forum/index.php/topic,10440.msg81245.html#msg81245The terminal doesn't exists anymore, but its footprint remained visible for a couple of years, until the pavement was remade with additional parkings. The link on Google maps has been updated so, if you want too see how airport was, you can only do it in Google Earth, which lets you loot at images from past years, and this is exactly how JFK looked like in 2013, when we released JFK V2.
The scenery is surely scheduled for a remake, but work on it will start after we'll publish the KORD remake, which is in even more dire need for an update, because it has new runways now.