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', '2041933c74c6ca609e40dc5b13219224', '216.73.216.109', '1765594967', '1765594967', '/shop_content.php/language/en/coID/1/content/Liefer--und-Versandkosten')

[XT SQL Error]