I've got the same issue. I had to change my pincode because I was tired of having to press "ok" after I'd give in my code, and unfortunately the only way to change this feature was to check/uncheck the box for that option; which is only available when you set a new code...
After doing this I wanted to go back to my previous code, but I'm having the same issues as the people who wrote about this earlier. I've now changed my code serval times and it's been a week ago, but I still can't change it to my oldest code.
How many times do you have to change it, or how long do you have to wait, to be able to go back to the old one?
Did you happen to find a solution? Or do you maybe know how long you have to wait or how many times you have to change your code before you can use an old one again? :)
It seems to be 4 recent PINs, at least it was on my Samsung Galaxy S10. Might be different on other phone models.
Unfortunately could not find an option to remove this, despite the error saying that device administrator does not allow using recent PIN and I am my own devices administrator...
I got the exact same problem with my phone and i can't change to old password at all, i have more than 10 old password and i still can reuse the one i want. This is really annoying.
