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', 'lh0ctlrblaaa9d84lrcevnjnj4', '54.80.188.87', '1540003703', '1540003703', '/catalog/default.php?cPath=46&osCsid=g7i783htnkats95nuutuacnun1')

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