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', 'd1252bba422836dacdf8cadb5f48ce4f', '216.73.216.148', '1755546800', '1755546800', '/product_info.php?info=p1850_San-Marino-Satellitenbild.html')

[XT SQL Error]