Only add instance if it is new

        if not receipt:

            receipt = MessageReceipt(uuid=message.uuid, successful=False)

            db.session.add(receipt)

        try:

            receipt.successful = self._handle_message(message)

        finally:

            db.session.add(receipt)

            db.session.commit()

    def _handle_message(self, message: Message) -> bool: