1366 - Incorrect integer value: '' for column `ngtkeZ_web1104_2`.`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', '894l8fn93uh741k8d760jqcbo0', '216.73.216.111', '1767456225', '1767456225', '/content/de/Unsere-AGBs.html')

[XT SQL Error]