Can't remove custom domains from App Engine projects

[Sven Rudolph]

Hello,

I want to remove some custom domains from one project and add them to another project.

I know, that I was able to remove custom domain before.

Now I only get the message (translated from German):

Only domain owners are permitted to remove an assignment

And the delete button is greyed out, with the message "You have no permissions to remove this domain"

I'm using the same(and only) user I used to add the domains to this App Engine project.

What do I have to do, to get the permission to remove my domains?

Thanks,

Sven

[George (Cloud Platform Support)]

Hello Sven, 

Does the user have the proper permissions, when you try to remove the custom domain names? You mention only one account. Is this user account the one who attached the custom domain names initially? This condition needs to be fulfilled, for it to be able to remove the same custom domain names. 

Waiting for your reply to this question, and eventual extra information you may deem relevant. 

[André Skoglund Hansen]

I have the same problem. I believe its because I removed the domain from my verified domain list (https://www.google.com/webmasters/verification/home).

Complete steps:
1. Added domain to verified domain list
2. Added custom domain to google app engine app
3. Lost verified domain
4. Button is gray, but I want to delete it to "clean up".