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', 'gm7hhaq6ub4psko6r8dae6c0q7', '54.80.96.153', '1537787012', '1537787012', '/catalog/product_info.php?name=Sigma%20Gamma%20Rho%20Metal%20License%20Plate%20Holder%20gold-%20DPFG&products_id=618')

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