1366 - Incorrect integer value: '' for column `abtecsho_shop`.`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', '9qql3tpq6vorr5cnenu56l7bb5', '216.73.216.110', '1763964840', '1763964840', '/index.php/cat/c5211_Loeschdecke-2m-x-1-6m.html')

[XT SQL Error]