Lock screen 'issue'

Recently I have tried for the first time the Private mode option in order to see how that mode works, and when I turned it off the lock screen is requesting the password or the finger swipe. No chance to disable them, and now everytime i have to swipe finger to unlock it.
How to disable this? Please check the photo as the Swipe mode and None are grayed out. I tried many things but nothing helps. Thanks