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', '3a90f5f8bd26a925b035c6dc6f28e2ab', '216.73.216.121', '1771135588', '1771135588', '/shop_content.php/coID/1/content/Liefer--und-Versandkosten')

[XT SQL Error]