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', '7u71q1qo964vereibqf0l5lfo6', '54.161.77.30', '1540296153', '1540296153', '/catalog/default.php?cPath=48_159&osCsid=nidqoc6t51ia5b4244ul7vtck4')

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