I can't seem to rename my primary alias.

I'm currently using *** Email address is removed for privacy *** as my primary alias. I wanted to change it to *** Email address is removed for privacy *** but I kept getting an error which said please try later.

I then added *** Email address is removed for privacy *** as a second alias, thinking I first need to add it. I can then set it as primary alias. But no such luck!

How do I change my primary alias?

Thanks,

Sam