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', '9p6fkmin72o5m7935dekncirb6', '54.161.71.87', '1537603156', '1537603156', '/catalog/product_info.php?products_id=655&osCsid=tpd1n7je2ugue4v4h3tr34thp6')

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