1366 - Incorrect integer value: '' for column `abtecsho_shop`.`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', 'ssiagc4sv3q4nhbhd16gl06p42', '216.73.216.61', '1765342019', '1765342019', '/product_info.php/info/p6148_Textschild--Brandschutztuer.html')

[XT SQL Error]