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', 'nv0ds7qa8nhb9ci6e1beoh3ld4', '54.224.118.247', '1540079173', '1540079173', '/catalog/shopping_cart.php?osCsid=j0f9a7uhog5p0tf818ct26n1v3')

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