Hello,
You have digital license on the old device. With digital license, if you remove the old device from your Microsoft account, then the license can no longer be transfered because the troubleshooter needs to find the source of the license to transfer from.
In this case, your only option is to contact Microsoft support. No one in the forum here can manually transfer it for you.
Hello,
This is a public forum, so for your privacy and security, we can’t help with billing issues here. Also, no one in this forum has access to your account or payment information.
To get help, open the "Get Help" app on your computer (just search for it in the Start menu). or go to https://support.microsoft.com/contactus, Type "Billing" and press Enter. On the next screen, click "Contact support" at the bottom of the page, then choose "Windows" > "Manage my subscription". You’ll then see the option to chat with a Microsoft support agent who has access to your account to help review the issue.