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', 'b5jhmhpjee7r9fevk3rb9r9ee6', '54.196.98.96', '1534329521', '1534329521', '/catalog/product_info.php?products_id=933&osCsid=25k5arr12sa5lbcu5hluppb5g6')

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