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', '8uckdn2pfglr6r94tqv76hjvu0', '3.84.182.112', '1555936369', '1555936369', '/lkw_plane_tasche_lkw_plane/product_info.php/info/p5_32-32-10.html')

[XT SQL Error]