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', 'rhqsi8hpqbarp32pk08kc4q5m3', '54.161.100.24', '1539669456', '1539669456', '/catalog/default.php?cPath=56&osCsid=4uc9d5jgo4kouck02c1kvqtp43')

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