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Fatal error: Uncaught mysqli_sql_exception: Incorrect integer value: '' for column 'copy_available' at row 1 in /home/polavar3/public_html/week13/handle_admin_add_new_book.php:9 Stack trace: #0 /home/polavar3/public_html/week13/handle_admin_add_new_book.php(9): mysqli_query(Object(mysqli), 'INSERT INTO boo...') #1 {main} thrown in /home/polavar3/public_html/week13/handle_admin_add_new_book.php on line 9