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', '5n2bo4g63k7r07e9bgcc80t8s6', '216.73.216.16', '1758147541', '1758147541', '/product_info.php?info=p1914_Trommeltasche-mittel.html')

[XT SQL Error]