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', '585452p9ldts2sv6fj4sdohk61', '54.81.150.27', '1537445564', '1537445564', '/catalog/product_info.php?name=Mason%20Graduation%20Stole%2090416&products_id=846')

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