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', 'di36g267tshlg1oqd42g5ptd31', '3.147.193.181', '1718730541', '1718730541', '/index.php/cat/templates/xtc5/admin/images/product_images/thumbnail_images/1344_0.jpg')

[XT SQL Error]