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', 'tbto3evvdf3d359dhcdvastum2', '54.161.100.24', '1540058718', '1540058718', '/catalog/product_info.php?products_id=168&osCsid=asa16g3a533v0o86dlqf954hv2')

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