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', 'gmd4eoa2hhjvv6u9lme6i0v7n6', '18.226.150.130', '1738999882', '1738999882', '/index.php?XTCsid=rvhpma4g2refpn33qk2f07nfb7&cat=c1218_M--hroboter-Zubeh--r.html')

[XT SQL Error]