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', '4h7siijcrv7cib5f5eb6ud3dd6', '54.158.208.189', '1539633319', '1539633319', '/catalog/product_info.php?products_id=729&osCsid=77thakpn5fa3d2hjudkdpcv9u1')

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