Fatal error: Uncaught mysqli_sql_exception: Duplicate entry 'H-A1803C-PMq' for key 'PRIMARY' in C:\xampp\htdocs\arex\datanow_fist_insert.php:25 Stack trace: #0 C:\xampp\htdocs\arex\datanow_fist_insert.php(25): mysqli_query(Object(mysqli), 'INSERT INTO dat...') #1 {main} thrown in C:\xampp\htdocs\arex\datanow_fist_insert.php on line 25