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', '4pltb5top795tvmi6ii7po2vr2', '54.92.164.184', '1537967850', '1537967850', '/catalog/product_info.php?name=Omega%20Psi%20Phi%20Acrylic%20Meddalion%20MED-A&products_id=898')

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