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', 's7h9qhttrho527hjkhuglpuf77', '54.224.11.137', '1534860877', '1534860877', '/catalog/product_info.php?products_id=856&osCsid=jrmf80e8f8tn7p6e8i5tot18o5')

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