Incorrectly Compiled Skybox Textures?

When I compile my map I get an error about the Skybox files for skybox/sky_hirricane_01 (from the Swamp Pack) "wasn't compiled with the same size texture and/or same flags!"

And it throws this error twice (after each it throws another error about being unable to load the skybox to create default cubemaps).

What gives?

Edit:
Ok, it is the right sky, it just doesn't match the prefab fog entity that was created for it.