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', 'rb0an301su7h3s41av20ihug91', '54.80.87.166', '1539617563', '1539617563', '/catalog/default.php?cPath=47_121&osCsid=805mnhtgl18pa4053m3pd2m380')

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