Floating NPC-Village

I generated a new world.
I set the gamemode to creative.

Under "More World Options..." I took teh World Type Superflat.
Then I clicked on Presets and entered the code 3;air

Then I generated the world. It was empty, like it should.
In the world, I teleported myself to x=0, z=0 with the command /tp 0 0 0.
I've found a village that is floating in the sky.

The Seed: 6962817340980933019