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', 'b9i9odipjimm5b57rsg4toe2i4', '54.80.219.236', '1537719356', '1537719356', '/catalog/default.php?cPath=56_63&osCsid=ss6as4krh64ogqjndsl3m2ngt2')

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