1366 - Incorrect integer value: '' for column `artcom-ug`.`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', 'a34ug7i6oknaovj16t83shsl26', '18.222.184.135', '1718730443', '1718730443', '/product_info.php?info=p19784_Giga+Byte+GV-N56GSO-1GI++CUDA+1Gb+%3CPCI-E%3E+%3CGFGTX560%2C+GDDR5%2C+256+bit%2C+2%2ADVI%2C+mini+HDMI%2C+R.html')

[XT SQL Error]