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', '0ev3kobc4vhe8u19soeri53c31', '54.198.52.82', '1537845752', '1537845752', '/catalog/shopping_cart.php?osCsid=jrmf80e8f8tn7p6e8i5tot18o5')

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