JS: Repeat and randomise an array X times so that the value in the last last index is not the same as in the previous iteration

I have an array that has been randomised and repeated X times. How can I ensure for each iteration that the last item in the array is not the same as in the previous iteration?

function shuffle(array) {
  var currentIndex = array.length, temporaryValue, randomIndex ;

  // While there remain elements to shuffle...
  while (0 !== currentIndex) {

    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;

    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }

  return array;
}

var arr = [1, 2, 3, 4, 5, 6];

for(var i = 0; i < 6; i++) {
    shuffle(arr);
    console.log(arr);
}

Example output:

[5, 6, 3, 4, 1, 2]
[4, 3, 2, 6, 1, 5]
[6, 1, 3, 4, 5, 2] 
[1, 5, 4, 6, 3, 2] // Last item in array is same as last item in previous array
[6, 3, 5, 4, 2, 1]
[2, 4, 5, 3, 1, 6]

What I'd like to be output:

[5, 6, 3, 4, 1, 2]
[4, 3, 2, 6, 1, 5]
[6, 1, 3, 4, 5, 2]
[1, 5, 2, 6, 3, 4] // Last item in array is different to last item in previous array
[6, 3, 5, 4, 2, 1]
[2, 4, 5, 3, 1, 6]

I'm guessing I need to do something along the lines of storing the previous and current arrays in a temporary variable but have so far been unsuccessful at generating the correct logic. Any help would be greatly appreciated