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', '0ac843319309a9e7269f47cc1c80edb4', '216.73.216.145', '1760885903', '1760885903', '/index.php/language/de/cat/c8_Relief-Map-Poster.html')

[XT SQL Error]