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', '2tqn6qfo8uvih6tfhfb3gcg1n0', '54.80.219.236', '1537720690', '1537720690', '/catalog/default.php?cPath=51&osCsid=ttkkrugv4r2ekkdcac1a85i286')

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