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', '49vn8ls6h7chsg2j9lutm7m8g6', '54.92.174.226', '1534588649', '1534588649', '/catalog/product_info.php?products_id=977&osCsid=4uc9d5jgo4kouck02c1kvqtp43')

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