1366 - Incorrect integer value: '' for column `jugglux_jstore`.`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', 'dpo2tg23a2tbs28g5e90vc2qu7', '3.94.21.209', '1606207233', '1606207233', '/shop_content.php/coID/24/content/Ueber-uns')

[XT SQL Error]