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', 'k0estisaljqqs0jkchgnn217t5', '54.161.71.87', '1537796492', '1537796492', '/catalog/product_info.php?products_id=348&osCsid=1s0j0lq98q7djo5j06uojiem70')

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