I was asked to enter 'PIN code' when tabbing on 'rest configurations' or 'reboot' on the screen of router

RouterOS Beginner Basics
1

Hi,
I have this MikroTik router model: RB2011UiAS-2HnD
I was asked to enter ‘PIN code’ when tabbing on ‘rest configurations’ or ‘reboot’ on the screen of router,
What is the PIN code? I have not setup PIN code.

2

http://wiki.mikrotik.com/wiki/Manual:LCD_TouchScreen#LCD_PIN_Code

Default PIN is 1234