1366 - Incorrect integer value: '' for column `pella-ware`.`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', '0vs60c75kv8n38k2fc72u0ke46', '3.237.186.170', '1711618888', '1711618888', '/login.php?XTCsid=0vs60c75kv8n38k2fc72u0ke46')

[XT SQL Error]