1366 - Incorrect integer value: '' for column `jugglux_jstore`.`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', 'vc8n542f1ho9vnudssvp9dihq3', '34.204.187.106', '1594498201', '1594498201', '/account.php/language/de')

[XT SQL Error]