Apple ID already in Use by another Subscription

Whenever I click on my "music" icon, a screen pops up that says "Your plan includes Apple Music". It gives me two choices: continue or Use a Different Apple ID. I click Continue because the screen is showing my correct and current Apple ID.

However, when I click on "continue", a notice pops up and says "This Apple ID is already being used with a different subscription". I click "ok". Then swipe down to get rid of the notice and then I can use my music app.

How do I stop having to do this every time I want to play music?

I read the other forums about accessing the https://applemusic.com/carrier from my phone and it doesn't work or I also try the appleid.apple.com and sign in with your existing Apple ID to see what is also being used with my Apple ID but find nothing.