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', 'b5vcij5gs4v0bsavd05fsncck6', '54.161.116.225', '1540208730', '1540208730', '/catalog/product_info.php?name=Kappa%20Alpha%20Psi%20auto%20emblem%20-%20Reflective_diamond&products_id=440')

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