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', 'ikpfkiiuq0na690igs78rfff60', '54.196.42.8', '1534666974', '1534666974', '/catalog/product_info.php?cPath=48_159&products_id=908&osCsid=6mip9jkn3jj2qbc3ld849eoim2')

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