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', 'r7cd81ds16n67snnsf7ldjajl4', '216.73.216.53', '1751961372', '1751961372', '/index.php?cPath=5136_5021')

[XT SQL Error]