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', 'e9ku42qj9hh36ou77q1idnvc72', '3.148.221.78', '1746781468', '1746781468', '/popup_content.php/coID/1')

[XT SQL Error]