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Can not reset my password

I have an account registered with another email but now I forget its password. I tried to reset my password in the forgot password section on the login screen, but every time I entered the verified code for my email there was a notification that the account linked with that email does not exist.

That is the same email I get updates from my post in the forum. I thought my account was deleted for some reason but when I register a new account with that email it says email has been used.

Is this a bug or am I doing something wrong? Can anyone help me?