so the more "cautious" way to change would be, if the given Session is not in legacy "autocommit" and the method is not using legacy "subtransactions", then we return the Session, because this is new ...

Hi @alexander-beedie As of 1.0.0 this is still a problem as the hardening was not applied to _is_alchemy_session (). async_sessionmaker is also unforunately not available as late as 1.4.49 of ...