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', 'aosf08vbrf7f25vh5j3ngf5dk7', '3.142.53.68', '1713612519', '1713612519', '/content/de/Impressum.html')

[XT SQL Error]