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', 'rt3l3pnuo0fcb078goolvr1nc5', '54.198.55.167', '1540016339', '1540016339', '/catalog/product_info.php?products_id=739&osCsid=asa16g3a533v0o86dlqf954hv2')

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