1366 - Incorrect integer value: '' for column `shop_db3`.`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', 'c2f6d5664b1df338d6f7060fb49d0b9e', '52.15.112.69', '1714191575', '1714191575', '/product_info.php?language=de&info=p248_Memory-Of-Spain.html&XTCsid=c00a13a977272d3659dd7fe5a5f758e9')

[XT SQL Error]