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', 't84da62skuiaa0o9uje5i7u2q6', '54.166.207.223', '1539814031', '1539814031', '/catalog/product_info.php?products_id=149&osCsid=injnirtmiecd9hs17sh4rq0h05')

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