Can't Change email?

This site is reaching me on my “business” email. I’d like to change it to my “personal” email address, but when I try to change the current address I get the message below. I do have an account in the main Krita forum. Are those linked to this list? At any rate, can I change my email address here? Thanks.

Change Email

There was an error changing your email address. Perhaps the address is already in use?

Email

Never shown to the public.

No this forum is not linked to the old forum. Have you, by any chance have tried to registered with the other email address in this forum?