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', '5mk4e7mi5s0oa8eemntj2hv561', '216.73.216.130', '1752612011', '1752612011', '/index.php?cat=c34_Shea-Produkte.html&XTCsid=fn79ppvumficeucetm3c17m8j7')

[XT SQL Error]