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', 'd9b447aa4ce7f6e9f55aa67ec88b82ed', '216.73.216.145', '1760948053', '1760948053', '/product_info.php/language/de/info/p4017_Relief-Map-Poster.html')

[XT SQL Error]