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', '1s2gk9600vmdigg1crjk2oqik2', '54.224.108.238', '1534533916', '1534533916', '/catalog/default.php?cPath=49&osCsid=4idg8if14sgdtl63grjalkt673')

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