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', '4jef2jle0jkn64p1lc6d1fuom1', '54.80.208.105', '1534357293', '1534357293', '/catalog/password_forgotten.php?osCsid=eafv6ikl3pru4tn4vdiu38lbe2')

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