Record Collection: Need help with collectionCopy is not defined error

Record Collection:
please can you help me what is wrong in this code:

function updateRecords(id, prop, value) {
    if (value !== "") {
        if (prop !== "tracks") {
            collection[id][prop] = value;
        } else {
              if (!collection[id].hasOwnProperty("tracks")) {
                  collection[id][prop] = [];
                  collection[id][prop].push(value);
            } else {
                  collection[id][prop].push(value);
            }
        }  
    } else {
          delete collection[id][prop];
    }
  return collection;
}

What do the failing tests say?

// running tests
collectionCopy is not defined
// tests completed

Did you modify anything outside of the updateRecords function?

no here it is

updateRecords(5439, "artist", "ABBA");
The code work well in chrome console;

Try clearing the solution and making sure that you only modify the contents of the updateRecords definition.

Hello the same thing happening

// running tests
collectionCopy is not defined
// tests completed

Are you absolutely sure that you didn’t touch this line?

// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
I did not see it in my code where to paste it please??
Hello thank you I paste it in the head of my function and it works

That line was already there. You must have deleted it. That’s why I suggested that you completely reset the challenge to and be careful to only change what is inside of the function definition.

Thank you Sir

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