Custom Domain Is Associated With Non-Existant App Project

[Mirza Baig]

A while go I had an App Engine project with a custom domain associated with it. I deleted that project but it looks like the domain is still associated with that project. I created a new project and it won't let me use that custom domain, it say's it's already associated with a project. What is the workaround? The old project doesn't exist anymore nor can I delete the custom domain.

[Kenworth (Google Cloud Platform)]

When the warning appears, it usually gives you an option or a workaround to follow. Can you give a screenshot of the error? 

Moreover, projects can be restored within 30 days before they are permanently deleted. A workaround is to restore the project, remove the custom domain on the restored project (as simple as clicking the trash button), and delete the project again. 

[Mirza Baig]

I deleted the project over two months ago. There is no way for me to restore the project.

[Kenworth (Google Cloud Platform)]

Based on the new information you provided, I highly recommend reporting the issue on our Public Issue Tracker so proper attention can be given to it. You can reference this thread as a background to the issue.