Earth

It turns out Earth was originally a rock that was tagged in some database somewhere as a potential waystation for traveling from one place to another. In order to make the place a more fun stop, an intelligence decided to terraform this rock.

In the elapsing time, there was some mistake in the database, Perhaps it was the laziness on a ship operator's part that let the Earth be left alone for a bit too long. The atmosphere, water, land, life forms have overrun the rock. So much so that the rock is now unfit for purpose.

Now that sentient creatures have evolved on this waystation, Earth has been declared unusable due to endangered species. Despite the best efforts by alien transportation lobbyists to have humans declared large bacteria, this status has saved us from destruction more than once.