I had an account on addons.mozilla.org. That was on pochta.ru email. Since they announced shutting down i changed it to yandex.ru.
https://addons.mozilla.org/ru/firefox/user/coth/
But my sync account was also on that yandex.ru mail.
https://addons.mozilla.org/ru/firefox/user/-coth-/
Eventually addons.mozilla.org was moved to sync account and now i can't access my old account as it require email to sign it instead of username. How can I restore access to old account? Or merge them together?