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', 'irkmkfggvecs0n89kunq11f474', '18.222.153.154', '1746776013', '1746776013', '/product_info.php?info=p70_802165-Edelstahlkaennchen-1-5-Liter.html')

[XT SQL Error]