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', '430577ladcfsir1m7m31hjshg6', '3.235.101.50', '1601421862', '1601421862', '/shop_content.php?coID=9')

[XT SQL Error]