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', 'gs3qg0fjvp8cu2cpv9rnc9cfo0', '54.80.188.87', '1540002819', '1540002819', '/catalog/privacy.php?osCsid=um1f6k5nf7telrq8rirmtai521')

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