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', '17d5fb53dcce2bb85946ff9eee5d4ebc', '216.73.216.122', '1758163625', '1758163625', '/index.php/language/de/cat/c40_Karten-Konfigurator.html')

[XT SQL Error]