1366 - Incorrect integer value: '' for column `argus_xtc`.`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', '8j0736ud4licfm25hdut2sq004', '3.85.143.239', '1558355599', '1558355599', '/shop/product_info.php?info=p688_WDR-Tag-Nacht-540-TVL-Standard-Kamera-12-VDC---24-VAC.html')

[XT SQL Error]