Fatal error: Uncaught mysqli_sql_exception: Subquery returns more than 1 row in /home/phyaqhyo/public_html/booking.php:34 Stack trace: #0 /home/phyaqhyo/public_html/booking.php(34): mysqli_query() #1 /home/phyaqhyo/public_html/lists.php(74): include('/home/phyaqhyo/...') #2 {main} thrown in /home/phyaqhyo/public_html/booking.php on line 34