Metronome sound on recording

How do I keep it out?

I’m just learning n-Track, and am just using the free download right now. I have the metronome on while recording, and am using the headphones to hear it, yet the metronome sound is audible on the recording. I obviously don’t want it there, as no great rock songs have a metronome playing in the background (cowbell maybe, metronome no) Any advice? Thanks.