Why i getting TypeError: Cannot read property 'artist' of undefined this error and how resolve it

Tell us what’s happening:

  **Your code so far**

// Setup
var collection = {
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',
  artist : "Prin"
}
};

// Only change code below this line
function updateRecords(object, id, prop, value) {
if(prop != "tracks" && value.length != 0){
 object.id.artist;
}
return object;
}

updateRecords(collection, 5439, 'artist', 'ABBA');
  **Your browser information:**

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36.

Challenge: Record Collection

Link to the challenge:

Because you’re trying to access property that doesn’t exist. If you want to use variable as a property you need to use bracket notation: object[id].artist