Apple Watch error- looks like you are already listening on another device

The first (and simplest) thing to try if something isn’t working right is to restart your Apple Watch and its paired iPhone. If necessary (device not responding), try a forced restart. Both methods can be found here:

How to restart your Apple Watch - Apple Support

Restart your iPhone - Apple Support

If that doesn't help, the next steps would be to unpair and pair your watch again and restore from the backup just created. This should result in no loss of data. It deletes all temp and corrupted files and re-indexes the file system.

Unpair and erase your Apple Watch - Apple Support

Set up your Apple Watch - Apple Support

Hey DanL17,

You've completed some great steps so far by unpairing and then re-pairing the Apple Watch and iPhone, making sure that the playlist you want to listen to is synced to your Apple Watch, ensuring that both devices are updated, and even restarting both devices. If the same happens when syncing any playlist to your Apple Watch and not just a specific one, it might be best to Contact Apple Support directly for more help on this one.

Take care.

Is there somebody else using your Apple ID to stream music at home while you are out?

Hello DanL17.

To help resolve your issue, check to see if your iPhone and Apple Watch has the latest updates. Apple's updates contain software that can help resolve many issues:

1. Update your iPhone or iPad - Apple Support
2. Update your Apple Watch - Apple Support

Follow the steps in this article to make sure you have gone through these steps to play music on your Apple Watch: Play music on Apple Watch - Apple Support

Thanks for using the Apple Support Communities, and have a great day!