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', 'cuq2rvu1f3c6vgjuuqn7v0s223', '54.161.71.87', '1537796339', '1537796339', '/catalog/default.php?cPath=54_146&osCsid=8h95hadm0fpj03al60ppfpcf57')

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