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', '774pu9rmg1qna1i5frn6u6um90', '54.198.52.82', '1537747010', '1537747010', '/catalog/product_info.php?products_id=462&osCsid=0tija7u18i1jv1o6pl5t8doqa4')

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