1366 - Incorrect integer value: '' for column `CP_as15`.`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', 'lp4uodo4rdo059p9ca9g119sv3', '3.145.94.92', '1738993999', '1738993999', '/index.php?XTCsid=mgdqk1fhm8rf8rhaciivk3tpt2&cat=c1142_Aufnahmeger--t-Akku.html')

[XT SQL Error]