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', '6jlgd2c7k7077kc476kgflehi6', '54.80.219.236', '1537717371', '1537717371', '/catalog/default.php?cPath=29&osCsid=metto148tubr22q5hrf95vddg2')

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