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', '8dmqmt5nv003emis9rpkdju2o4', '3.21.126.72', '1746984705', '1746984705', '/product_info.php/info/p6523_Textschild--Notausgang-freihalten.html')

[XT SQL Error]