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', 'r0k3oivko7hvatslomr24l78s2', '3.17.74.222', '1746981623', '1746981623', '/address_book.php')

[XT SQL Error]