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', 'k7h66d2kng3uicd0f95kcsmqe3', '54.80.208.105', '1534357220', '1534357220', '/catalog/product_info.php?name=Phi%20Beta%20Sigma%20Auto%20Emblem%20-%20REFLECTIVE_HAND&products_id=783')

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