1366 - Incorrect integer value: '' for column `shop_db3`.`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', '1911e2ee4d5040f6003f35144a156213', '18.189.193.172', '1713495919', '1713495919', '/shop_content.php?coID=2&XTCsid=9ed062a1d997e94e67f071e9bc3ac71b')

[XT SQL Error]