You should not change code above the specified comment

Tell us what’s happening:

You should not change code above the specified comment.
i didn’t change the code above is there anyone can help what do, i correct everything ales.

// Setup

var a;

var b = 2;

// Only change code below this line

b = 7;

//b = a;

// Setup
var a;
var b = 2;
// Only change code below this line

b = 7;
//b = a;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36.

Challenge: Assigning the Value of One Variable to Another

Link to the challenge:

Did you copy-paste the code twice, or is it in your editor twice?

You did change code above the line.

This is how the challenge code starts:

// Setup
var a;
a = 7;
var b;

// Only change code below this line

I suggest resetting the challenge and starting fresh.