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', 'sudij900p79l12bfcitjcrln32', '216.73.216.232', '1751321048', '1751321048', '/product_info.php?info=p1897_Batikhemd-mit-Standardkragen.html')

[XT SQL Error]