1366 - Incorrect integer value: '' for column `pella-ware`.`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', 'f981737621a320cda0a7cc76fd5377b4', '35.168.113.41', '1710829010', '1710829010', '/shop_content.php?coID=1')

[XT SQL Error]