1366 - Incorrect integer value: '' for column `hbl_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', 'hfrf4gtt6qc94f72bof2jl5ba7', '216.73.216.175', '1761848596', '1761848596', '/product_info.php?info=p65_800635-Kleinsaemaschine--Paula-.html')

[XT SQL Error]