1366 - Incorrect integer value: '' for column `abtecsho_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', '62us673eebh9b1pkeq3e0h0o14', '216.73.216.200', '1752880715', '1752880715', '/index.php?cPath=5136_5021')

[XT SQL Error]