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', '9bkl2qtbkbd1u58hv94kl6l4q0', '54.145.83.79', '1539690143', '1539690143', '/catalog/default.php?cPath=51&osCsid=1fl7aeo482l0scbjv03kvb0il1')

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