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', '6kb8ktlg67bq7pbll0ms897jg2', '54.80.87.166', '1539613894', '1539613894', '/catalog/product_info.php?products_id=631&osCsid=rbairlj6lekttgj7teb1lkve83')

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