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', 'j0f9fnede0lgenvabgngtmv3i0', '54.225.26.44', '1539779961', '1539779961', '/catalog/product_info.php?products_id=946&osCsid=8gbo9gpp1shp6q509a7614gbp7')

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