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', '5897lghbjrq9e691mgu7erbqj5', '54.162.239.233', '1537401740', '1537401740', '/catalog/default.php?cPath=48_256&osCsid=ttkkrugv4r2ekkdcac1a85i286')

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