1366 - Incorrect integer value: '' for column `agentur`.`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', 'faqiaehdj0j5e54tup6hdcahu7', '3.239.7.207', '1627089397', '1627089397', '/')

[XT SQL Error]