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', 'bitvdlsr5oc96flsp3cnu4up73', '216.73.216.40', '1767169180', '1767169180', '/product_info.php?info=p1804_Bogolan-Wandbehang.html')

[XT SQL Error]