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', 'e31e1e153eaf22e9808047a25b3bb0bd', '216.73.216.116', '1752277257', '1752277257', '/index.php/language/de/cat/c35_Countries.html/page/3')

[XT SQL Error]