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', '1a7kf867j3r7uvr9ll8v3ll5i6', '3.129.17.245', '1746980881', '1746980881', '/product_info.php/info/p6234_ISO-7010--E001-E005--Rettungsweg-links.html')

[XT SQL Error]