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', '53qk30bu2llpa6m3g8kd7pv9k5', '54.158.199.217', '1537893909', '1537893909', '/catalog/product_info.php?products_id=152&osCsid=805mnhtgl18pa4053m3pd2m380')

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