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', 'gk1i8admu75qgqn6p4f476nhb3', '54.161.71.87', '1537601024', '1537601024', '/catalog/product_info.php?products_id=670&osCsid=tpd1n7je2ugue4v4h3tr34thp6')

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