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', 'gpbs4s8rgdnngpqgaad88vu4m4', '54.92.174.226', '1534588519', '1534588519', '/catalog/privacy.php?osCsid=el09sqh781fngqk51f9s8l3ah6')

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