Fatal error: Uncaught mysqli_sql_exception: Duplicate entry 'new_user' for key 'users.username' in /home/quinta29/public_html/newinfost440/assignment7/insert.php:25 Stack trace: #0 /home/quinta29/public_html/newinfost440/assignment7/insert.php(25): mysqli->query('INSERT INTO use...') #1 {main} thrown in /home/quinta29/public_html/newinfost440/assignment7/insert.php on line 25