1366 - Incorrect integer value: '' for column `dogsdream`.`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', 'ce0c6cb7974921159855739a59576797', '18.225.72.161', '1732272479', '1732272479', '/shop/product_info.php/info/p4_BIO---Ingwer---Algenplaetzchen-Gro-packung.html')

[XT SQL Error]