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', 'gkb060ptmus0iq0ubbvrimlvn4', '54.198.55.167', '1539751672', '1539751672', '/catalog/product_info.php?cPath=50_132&products_id=456&osCsid=a7p66irpp7hhhlp3kv6d6ps812')

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