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', 'a3j8rkcnr2fqrt208c3k4jc7n7', '54.80.93.19', '1534560071', '1534560071', '/catalog/default.php?cPath=50_134&osCsid=bsio3l9d02mmru89vf7qc48k57')

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