Fatal error: Uncaught mysqli_sql_exception: Duplicate entry '11' for key 'PRIMARY' in /users/2020/i2019011/public_html/WebDB/06/insert.php:27 Stack trace: #0 /users/2020/i2019011/public_html/WebDB/06/insert.php(27): mysqli_query() #1 {main} thrown in /users/2020/i2019011/public_html/WebDB/06/insert.php on line 27