Apple Music on my secondary iPhone
I recently got a new phone and I want to use my old iPhone to download music on Apple Music. When I attempt to download music on the old iPhone it gives me the pop-up, "You must transfer this device to your Apple ID to play content saved offline. You will be unable to transfer this device again for 90 days." So here is my question. How do I download music on that secondary iPhone without transferring accounts? Is there another way without transferring accounts?
iPhone 6s Plus, iOS 13