1366 - Incorrect integer value: '' for column `drucktiv`.`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', 'gos2133imvu0qnbnlov46phs24', '216.73.216.54', '1770358640', '1770358640', '/')

[XT SQL Error]