Error writing user to database, what to do?

Question

PHP

Here is the script itself:

if(isset($_SESSION["steamid"])) {
        $loggedIn = true;

        $steamid = $_SESSION["steamid"];
        $nickname = $_SESSION["personaname"];
        $avatarfull = $_SESSION["avatarfull"];

        mysqli_query($connect, "INSERT INTO users (steamid, name, avatar) VALUES ('$steamid', '$nickname', '$avatarfull')");
    }
    else {
        $loggedIn = false;
    }

Mistake:

Fatal error: Uncaught exception 'mysqli_sql_exception' with message 'Duplicate entry '76561198131980154' for key 'PRIMARY'' in C:\OpenServer\domains\localhost\index.php:26 Stack trace: #0 C:\OpenServer\domains\localhost\index.php(26): mysqli_query(Object(mysqli), 'INSERT INTO use...') #1 {main} thrown in C:\OpenServer\domains\localhost\index.php on line 26

It looks like it's written correctly, what's wrong?

Answer 1

You also wrote: Duplicate entry '76561198131980154' for key 'PRIMARY'' - an entry with the key 76561198131980154 already exists in the database. Decide on the logic of work. Use Insert or Update or Insert ignore

Answer 2

The bracket is not closed. It should be like this:
'$avatarfull')");