Lost account access by switching mails on my Mozilla account

Hi,

some time ago I switched the primary mail on my Mozilla account (“farblos”).

Now when I try to log on here through my Mozilla account, Mozilla Discourse recognizes my credentials, but offers me to create a new account, not letting me use my previous Mozilla Discourse account (also “farblos”) here.

How would I get access to that account?

Unfortunately, I already have disposed off the primary mail which I used initially on my Mozilla account. And I’d have to wait some N months until I could use it again.

Thanks!