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', 'jdaokkh6kb9qand19mhred48f3', '54.198.15.20', '1540045818', '1540045818', '/catalog/shipping.php?osCsid=cj96ud5m91vrom51k86kkrn100')

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