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', 'mm1vo56unntot8pq3qs693sqt4', '54.162.133.222', '1539971494', '1539971494', '/catalog/default.php?cPath=54_143&osCsid=jajf002h794h58quhkrubtrip2')

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