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', 'j28otap8ast31f7pqhtv8t32l5', '54.161.71.87', '1537332867', '1537332867', '/catalog/shopping_cart.php?osCsid=t2t0ami1ie3s69bp1j36r92p81')

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