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', 'b99o0n6cciru1i002feuddg521', '18.97.9.171', '1739299825', '1739299825', '/index.php?cat=c32_Koerbe---Taschen.html')

[XT SQL Error]