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', '7apl2d8im5arsnebttmrf349t7', '54.225.26.44', '1539638251', '1539638251', '/catalog/product_info.php?products_id=404&osCsid=6q22g9v782pmqj4ifo8m6kdr81')

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