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', 'c98j2orja3o1b0ih5en63898p0', '54.80.140.29', '1534484281', '1534484281', '/catalog/product_info.php?products_id=984&osCsid=dfdm6bjp57fo37le0fabfdmvc4')

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