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', '52uks322eccnukhknqnhr4die5', '54.166.203.17', '1537675417', '1537675417', '/catalog/product_info.php?products_id=375&osCsid=hbj6odueolk8cdehlhnngm87m7')

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