1366 - Incorrect integer value: '' for column `hbl_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', '17tl5if922btpme2ts7t1ln025', '18.97.9.175', '1745810243', '1745810243', '/product_info.php?info=p545_801922-Kalk--Universalspritze--verzinkt.html')

[XT SQL Error]