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', '3hv4rfgmfbevsco0usuq8dr3b2', '3.235.101.50', '1601420199', '1601420199', '/')

[XT SQL Error]