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', '6kkj86jas3chciqasf3p1040m4', '54.198.15.20', '1540355374', '1540355374', '/catalog/products_new.php?page=6&osCsid=m5puq1abugmhpt6dh75k43rcf2')

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