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', '6s8hd27itc31jg587s7pl218t0', '54.80.83.123', '1537522072', '1537522072', '/catalog/product_info.php?products_id=927&osCsid=v83us4qi9a92tcqp03vimpdo46')

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