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', '528s14n6cmelslaujruriut6g1', '54.198.23.251', '1537411748', '1537411748', '/catalog/product_info.php?cPath=48_62&products_id=152&osCsid=rj97frenr7vr9pg12john2iat1')

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