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', 'r86fatqnnu1v2h8f3u7spi13m2', '216.73.216.108', '1752707957', '1752707957', '/index.php?cat=c65_Koerbe-V-Form-M.html')

[XT SQL Error]