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', '5eq7b82b52tv13iq8ut9o3ul42', '54.198.205.153', '1537488617', '1537488617', '/catalog/product_info.php?products_id=981&osCsid=5faivbopqqr3v8n1efg6sijv17')

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