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', 'em3ina1t7kgc43n5mnjrnfoum4', '54.92.164.184', '1537965205', '1537965205', '/catalog/product_info.php?name=Kappa%20Alpha%20Psi%20Wood%20meddalion%20dia%20W-MED&products_id=907')

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