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', 'vuk8jcub5583g711snh35u4jb5', '54.224.247.42', '1540206146', '1540206146', '/catalog/product_info.php?name=Eastern%20Star%20Key%20Chain%20-%20OES_DKC&products_id=696')

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