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', 'craleu89abidi3d5fu4vgmp2u2', '54.198.52.82', '1537605870', '1537605870', '/catalog/shopping_cart.php?osCsid=rc3qog552hg5atl4j0knam8ol1')

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