Non-oauth account, errors "Oauth 2 is not supported"

I have an account setup in K9, which used to be hosted at gmail, using imap settings back when that was allowed. I moved the whole domain + account to another provider, which does not support oauth2.

Despite me setting “Normal password”, when I test the settings I get “Oauth 2 is not supported by this provider” error.

Is some part of the old gmail settings lurking? I have changed the imap hosg setting.