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', '5uptkp763fbm826u1sh67fg1m3', '54.80.188.87', '1539850316', '1539850316', '/catalog/allprods.php?osCsid=gdto7isbeff1bnempgq8p1mgr1')

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