Reset table/Reset scene

Manadrunk

Hi everyone

I'm making a game where the player walks to a machine and enters a code. This happens in two different scenes. In the first scene you can click on the machine and in the second scene you see the number pad.
I used this tutorial for the second scene.
My problem is that you can only enter your code once. But you should be able to try as many times as you want to.

Could one of you lovely people help me?
(I'm sorry for my bad English.)

Edit: I've tried to copy a new table over my old one but then I can't write in it. Which makes sense because it's a new table... I just need to know how I can reset the old table or reset the scene everytime one pushes a specific button.