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', 'mr0feae13hspcq75f7q51h3qg4', '54.80.83.123', '1537839077', '1537839077', '/catalog/product_info.php?name=Kappa%20Alpha%20Psi%20small%20Acrylic%20Lapel%20Pin%20GPC&products_id=919')

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