async def hard_reset_chat_session(
        update: Update | None,
        context: ContextTypes.DEFAULT_TYPE
    ) -> None:
    application = getattr(context, "application", None)
    if update is not None and application is not None:
        seen_handlers: set[int] = set()

        def iter_conversation_handlers():
            def walk(handler):
                if not isinstance(handler, ConversationHandler):
                    return

                handler_id = id(handler)
                if handler_id in seen_handlers:
                    return
                seen_handlers.add(handler_id)

                yield handler

                for child_handler in getattr(handler, "_child_conversations", []):
                    yield from walk(child_handler)

            for handlers in application.handlers.values():
                for handler in handlers:
                    yield from walk(handler)

        for handler in iter_conversation_handlers():
            try:
                conversation_key = handler._get_key(update)
            except RuntimeError:
                continue

            handler._update_state(ConversationHandler.END, conversation_key)

            timeout_job = handler.timeout_jobs.pop(conversation_key, None)
            if timeout_job is not None:
                timeout_job.schedule_removal()