Record Collection Challenge - can't delete prop

Tell us what’s happening:
I have passed all the tests except deleting when the value is empty and I really can’t figure out where’s the mistake. Thank you to anyone you will help me with this!

Your code so far


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

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

// Alter values below to test your code

updateRecords(5439, "artist", "ABBA");

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Challenge: Record Collection

Link to the challenge:
https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-javascript/record-collection

Thank you!!! I was focusing on the last line of the code since I thought I had passed the other tests.
Now I am wondering why it didn’t return an error given the typos? Was Javascript just skipping to the second comparison? And why was it affecting “delete colletion [id][prop]”?