Problem with the camera

Hello, first of all, sorry for my English, I’m argentinian. I’m having some trouble with cameras in Unity 5.4.1. When I enter in game mode, any camera I have in my scene shows me an orange background. It only happens in one scene, but it started to happen after I created a new one and changed to it (before that, the first scene didn’t have any problem with the camera). The new scene’s camera works correctly, but all my work was done with the other one.
Any ideas? I don’t know what to do

The “Clear Flags” might be a “Solid Colour” or something.