1366 - Incorrect integer value: '' for column `dogsdream`.`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', '1d04a57ae87dcf284e5288788871d4a6', '216.73.216.162', '1755325661', '1755325661', '/shop/index.php')

[XT SQL Error]