Animations Wont Play, Must be marked as legacy?

Hi Everyone,

Im fairly new to unity but have a fair knowledge of programming.

I have made an animation with mechanim using a flashlight model that is a fbx file. It contains a spotlight which I use code to toggle it on and off with some code. I have a default animation that doesnt animate anything but is linked to and animation on a condition that a bool is false.

I want to be able to press "f" the toggle button in the code to turn the bool false or true, so from there it should play the animation ? Ive tried everything but it says the animation needs to be marked as legacy or something ?

I'm so confused any help will be appreciated!