Records not updating

I am trying to write a function that does the following:

  • Your function must always return the entire record collection object.
  • If prop isn’t tracks and value isn’t an empty string, update or set that album’s prop to value .
  • If prop is tracks but the album doesn’t have a tracks property, create an empty array and add value to it.
  • If prop is tracks and value isn’t an empty string, add value to the end of the album’s existing tracks array.
  • If value is an empty string, delete the given prop property from the album.

When I run the code I get an error saying records are not being updated as expected:
// running tests After

updateRecords(recordCollection, 5439, "tracks", "Take a Chance on Me")

,

tracks

should have the string

Take a Chance on Me

as the last and only element. After

updateRecords(recordCollection, 2468, "tracks", "Free")

,

tracks

should have the string

1999

as the first element. After

updateRecords(recordCollection, 2548, "tracks", "")

,

tracks

should not be set // tests completed

This is the code I have written and it all looks correct to me, I’ve gone over it 100 times. What am I missing??

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

updateRecords(recordCollection, 5439, 'artist', 'ABBA');

// Setup
const recordCollection = {
2548: {
  albumTitle: 'Slippery When Wet',
  artist: 'Bon Jovi',
  tracks: ['Let It Rock', 'You Give Love a Bad Name']
},
2468: {
  albumTitle: '1999',
  artist: 'Prince',
  tracks: ['1999', 'Little Red Corvette']
},
1245: {
  artist: 'Robert Palmer',
  tracks: []
},
5439: {
  albumTitle: 'ABBA Gold'
}
};

// Only change code below this line
function updateRecords(records, id, prop, value) {
if (prop !== 'tracks' && value !== "") {
  records[id][prop] = value;
} else if (prop === "tracks" && records[id].hasOwnProperty('tracks')) {
  records[id][prop] = [value];
} else if (prop === 'tracks' && value !== "") {
  records[id][prop].push(value);
} else if (value === "") {
  delete records[id][prop];
}
return records;
}

updateRecords(recordCollection, 5439, 'artist', 'ABBA');
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Challenge: Record Collection

Link to the challenge:

what does this condition say, in words?

It’s supposed to be saying:

I figured, but what does this part mean?