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', '89e4ae7b7e854da7104b2932911938a0', '216.73.216.191', '1758206876', '1758206876', '/shop_content.php/language/de/coID/1/content/Liefer--und-Versandkosten')

[XT SQL Error]