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', 'qngomgeic3f9ah41nesmt5ci25', '216.73.216.22', '1768979885', '1768979885', '/newsletter.php')

[XT SQL Error]