1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '24ee3e2def981fc109938ca99e6684d2', '216.73.216.116', '1752308518', '1752308518', '/index.php/language/de/cat/c6_Satellitenbild-Poster.html')

[XT SQL Error]