1366 - Incorrect integer value: '' for column `hoc_db9`.`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', 'e4ea3acc21975f3b570fb76a66278a4e', '3.238.252.196', '1659930845', '1659930845', '/shop_content.php/language/en/coID/4/content/Impression')

[XT SQL Error]