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', '7eccp6bb79jel1n0etmov2rt72', '3.235.101.50', '1601418035', '1601418035', '/shop_content.php?coID=1&XTCsid=ib6sbj9jrs0n6ls84ctf015q06')

[XT SQL Error]