Another guy has discovered a old firmware and CheckFirm saved it, so it shows roll back. Just discover a new fw and it will change. If your issue is solved, please accept my comment as solution to help others by clicking at 3 dots on my comment 😊😉
They occasionally test old firmware for making bug fixes. During that period check firm shows those firmware as rollback. Those firmware didn't get released via ota. You don't have to worry about it. You will get new update when it is ready.
