1366 - Incorrect integer value: '' for column `argus_xtc`.`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', 'e2gsmv4vfm5mvelb61ramdnta6', '3.85.143.239', '1558358932', '1558358932', '/shop/shopping_cart.php')

[XT SQL Error]