Functional Programming - Return a Sorted Array Without Changing the Original Array

Could someone please explain to me what is wrong with my code. I tested it in VS Code and it returned all test responses. correctly. But i cant seem to pass the last two tests in the freeCodeCamp console.

Thanks in advance.

const globalArray = [5, 6, 3, 2, 9];

function nonMutatingSort(arr) {
  // Only change code below this line
  arr = globalArray.slice()

  return arr.sort((a, b) => a - b);

  // Only change code above this line
}

nonMutatingSort(globalArray);

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Challenge: Functional Programming - Return a Sorted Array Without Changing the Original Array

Link to the challenge:

You should not replace arr with a copy of the global array. Copy arr itself instead of replacing it with a copy of the global array.

I see.
Thank you very much for the answer!