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', '1f7e58c8f83dbbc22a7abad54ff93be1', '216.73.216.130', '1768172328', '1768172328', '/index.php/language/en/cat/c33_Satellitenbilder-Digital.html')

[XT SQL Error]