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', 'bf5qq8a9bdl1j28l778gkhpt44', '54.198.142.121', '1537914519', '1537914519', '/catalog/default.php?cPath=54_151&osCsid=konekjck7lldmfuguhofe5f2m2')

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