How do I switch music using blueprints?

I have a sound cue/ambient sound dropped into my game that works, how would I go about killing the current music and switching to a different song on an Overlap Event or just a custom event? This is where I get music: line 着信音

If you already playing your sound, I assume you already have an Audio Component attached to an actor. So doing the stop / switch is easy, here just doing it with a quick and dirty keyboard event, but any other event behaves the same.
You can call Stop to end the playback, then call Set Sound and Play for a new track. In the example, just setting a new sound and playing this does work, also without stopping first, but maybe it is cleaner to stop playback first