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', '9i9o15b4n4knvrn0chqssa9166', '54.161.71.87', '1537368080', '1537368080', '/catalog/create_account.php?osCsid=gdto7isbeff1bnempgq8p1mgr1')

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