Lens flare has everything to do with the angle of the light hitting the lens. If you don’t want a great big blob of green, the best way to get rid of it is to shift your camera. It doesn’t take much to change the angle of light. Unfortunately, once the photo is taken, it’ll require a photoshop job to get rid of it. 🙁
Here’s an example of how moving the camera changes the lens flare sizes and shapes. https://www.youtube.com/watch?v=Dxa5EOBTu38