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', 'g9ugug0765pva6hmtolu5eqip7', '52.14.161.77', '1738997827', '1738997827', '/index.php?XTCsid=rvhpma4g2refpn33qk2f07nfb7&cat=c527_Digital-Kamera-Zubeh--r.html')

[XT SQL Error]