1366 - Incorrect integer value: '' for column `hbl_shop`.`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', 'dhe3lc3o9h6dobe5tmrpu1h3s4', '216.73.216.36', '1749253709', '1749253709', '/product_info.php?products_id=46')

[XT SQL Error]