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', 'djjfvl4tnu03jt7hjm381152u3', '54.198.55.167', '1540020740', '1540020740', '/catalog/default.php?cPath=52_65&osCsid=asa16g3a533v0o86dlqf954hv2')

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