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', 'kacrhj8k65kk15juivs8f8nms3', '54.156.39.245', '1540217365', '1540217365', '/catalog/product_info.php?products_id=614&osCsid=e2dd2b06qfq8d01d0o0h6nq4a6')

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