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', 'qnvrbk6utc04kajicc49jp5j75', '54.92.190.11', '1537326986', '1537326986', '/catalog/password_forgotten.php?osCsid=abj3lncob7t2muta8gk9ilmv56')

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