Input Manager - why is there more than one "Fire1" listed?

I’ve already tried renaming the inputs - not doing that again, totally screwed me.

So I’m just sticking with the existing name labels. There are two “Fire1” names under the input manager. Which one do I use if I want to set both a keyboard and joystick input?

Thanks!

Just coming back to say - still not sure! But I did figure out that if you want more than one input, such as a keyboard and a controller, it’s better to use both labels rather than the alt positive button. Idk, it’s less buggy.