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', '1f72e472e89e64393ff0841a293027dd', '3.140.186.241', '1715124514', '1715124514', '/product_info.php?language=de&info=p248_Memory-Of-Spain.html&XTCsid=752467afa49d1c2decc281986e95df51')

[XT SQL Error]