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', '7uvv5t2dqmm39oi354mrs0ser7', '216.73.216.161', '1755676376', '1755676376', '/content/de/Impressum.html')

[XT SQL Error]