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', 'honspf08c51p9ib27slftperh0', '54.80.219.236', '1537300770', '1537300770', '/catalog/shopping_cart.php?page=1&osCsid=selghm7ktacgf4odv8d2frupi3')

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