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', '9gf4tmffe7h7h90u5s28ptk211', '3.128.170.227', '1741831386', '1741831386', '/index.php/cat/c131_Brandschutzzeichen.html')

[XT SQL Error]