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', 's34uak65qb4nm46g1epjb0k9t0', '54.198.15.20', '1540361743', '1540361743', '/catalog/product_info.php?products_id=472&osCsid=6gc9g9tl609aetu37766nebsa1')

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