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', '574d2dcf6408a41bc20dd2c5d178443f', '216.73.216.108', '1763277931', '1763277931', '/product_info.php/info/p2846_Satellitenbild-Poster-Konfigurator.html?refID=1')

[XT SQL Error]