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', 'et7140ii63m64kakk5b227vhq0', '54.80.87.166', '1540309085', '1540309085', '/catalog/default.php?cPath=50&osCsid=m6d10ruq6qvb0naa5dc2tnra62')

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