Q: I don't remember the guided access Password, Stuck! Any way out?

I put a Guided Access Passcode months ago (Don't remember now).

My sister started the Guided Access & It's been locked on the same App.
I tried some probable passwords, None worked, else I won't be typing all this.
It keeps on increasing the time gap for successive trials for entering the password but not any option for exiting the guided access any other way

Is there any way to undo the Guided Access without Restoring?