1366 - Incorrect integer value: '' for column 'customer_id' at row 1
insert into user_tracking (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url, page_desc) values ('', 'Guest', '4c7458a5cc2feda3cf438b59f6c090d8', '3.141.3.175', '1727530972', '1727530972', '/shop/affiliate_affiliate.php', 'Melden Sie sich an oder geben Sie Ihre Benutzerkennung ein:')