Can't drop a second audio clip to the timeline?

I’m trying to do a video with some background sound but part requires a second audio track. I can add the video fine. On a separate audio track I can add the audio clip just fine. No problem. However, when I try to add a second audio clip I can’t add it. I just get the cursor with the slash saying I can’t add it. It doesn’t seem to matter if it’s 2 audio tracks or just 1.

I did some searching and see that there’s a bug with Windows users not being able to drag/drop things to the timeline. I’m not sure if this is the same issue since I can do one video and one audio track. Is there something I’m missing?

Sorry, I’m a noob. ¯-(ツ)-/¯

Tried pressing ctrl+u for a new audio track?