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', '5pchtvle1nk9rgnupbqb31sc01', '54.225.26.44', '1539942364', '1539942364', '/catalog/default.php?cPath=52_186&osCsid=65f07ms35to1j1036qk1srf7q0')

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