1366 - Incorrect integer value: '' for column `magickland`.`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', '30ev79knj4mappqbt8gl0ts1n4', '3.15.143.95', '1718727913', '1718727913', '/index.php/cat/admin/images/icons/templates/xtc5')

[XT SQL Error]