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', '98a443e492092fc721fa8036ce21aff0', '3.16.69.143', '1713598400', '1713598400', '/product_info.php?language=de&info=p247_Nessun-Dorma.html&XTCsid=4a502cf522b059da09cfca377185d405')

[XT SQL Error]