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', '340110d84c168b0c4b7707ca8f32f512', '216.73.216.53', '1752094336', '1752094336', '/index.php/language/en/cat/c35_Laender.html')

[XT SQL Error]