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', 'i163hu4s86dld7otme3tbme1n2', '54.80.87.166', '1540314091', '1540314091', '/catalog/product_info.php?name=Phi%20Beta%20Sigma%20Auto%20Emblem%20-%20REFLECTIVE_HAND&products_id=783')

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