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', '0577hq9vt4ecsjhpuq9rk8c8n5', '54.80.87.166', '1540041598', '1540041598', '/catalog/product_notifications.php?osCsid=6nkugtbpv3rck81in4amd2pe47')

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