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', 'esuhl329rpkqidrigrffv0aio0', '18.97.9.174', '1743167800', '1743167800', '/index.php/manufacturers_id/19')

[XT SQL Error]