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', 'jkudh8v2r3lkb6poh7jn29c5a5', '54.80.219.236', '1537719561', '1537719561', '/catalog/product_info.php?products_id=981&osCsid=59ol2pnie7sri73nki47numir6')

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