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', '11pq53j34k3369l72qr1oji0b4', '54.162.15.31', '1537584768', '1537584768', '/catalog/product_info.php?products_id=819&osCsid=rgco69d72v37m43anv5mvpmqn5')

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