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', '0ppjahsshki2p3h17mj563tcp4', '54.92.163.105', '1540152101', '1540152101', '/catalog/user_agreement.php?osCsid=miv632dg05tj7q93u4rolmks73')

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