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', '0ndutukle5vi27l0prib5i9sr2', '54.162.118.107', '1539767858', '1539767858', '/catalog/default.php?cPath=46_130&osCsid=h94baqsubt2tg2vr0p0oc07vl2')

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