1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '9447e59b723214c8cd3137de7e240c8a', '3.238.174.191', '1713134101', '1713134101', '/product_info.php/info/p10_3D-Druck.html')

[XT SQL Error]