Lets say I'm on page X and then I navigate to PAI(X+1), now on PAI(X+1), if I click the back button, I need to navigate to the PAI(X-1) and not the PAI(X) In other words, when I navigate from the PAI(X) to PAI(X+1), the PAI(X) should be removed from the stack while other views in the stack should be maintained.

PAI => page at index