1366 - Incorrect integer value: '' for column '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', 'ebe7ca26e0e6250176edef93e15086f3', '18.118.12.101', '1713499487', '1713499487', '/product_info.php/info/p9_Wald-Bluetenhonig.html')

[XT SQL Error]