1366 - Incorrect integer value: '' for column `sql12320`.`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', '8db87862f3e0be1525f612a9a7e0f81a', '3.83.188.254', '1585988985', '1585988985', '/shop/index.php/cat/c8_Bienenwachsprodukte.html')

[XT SQL Error]