1366 - Incorrect integer value: '' for column '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', 'ldldmbblg88rod72860k3bp8h2', '54.156.39.245', '1539736517', '1539736517', '/catalog/products_new.php?osCsid=s3dc3tpt9roues6qdm074j46e1')

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