1366 - Incorrect integer value: '' for column `usr_web74_1`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'nsh53i19jggpl6sbjcr87mjj27', '216.73.216.46', '1771992917', '1771992917', '/product_info.php?products_id=254')

[XT SQL Error]