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', 'd3i7itv8r5t0sc6bg2q3mrbva3', '54.198.52.82', '1537845705', '1537845705', '/catalog/default.php?cPath=49&osCsid=gbp3fm761htkduhtk5lucb7203')

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