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', '09c15pl4dvb1849au4o4e268o5', '18.226.82.177', '1738998106', '1738998106', '/index.php?XTCsid=3o9rajic4fkoo3bb243kehab14&cat=c1242_Smartwatch-Zubeh--r.html')

[XT SQL Error]