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', 'ba4k1s8k76u492ktkgnepkbnd5', '18.207.106.142', '1600703745', '1600703745', '/index.php?cat=c22_Lafer--Lichter--Lecker--Aufzeichnung-August.html&XTCsid=2d4qg7ftupcpr3opjmmv969b12')

[XT SQL Error]