Adding user data to an existing user_id

here is Query. Try this, don’t forget to replace user_id with actual userid, meta key with your meta_key like “phone_no” and meta value with your meta_value like “1238899776”.

INSERT INTO `wp_usermeta`(`user_id`, `meta_key`, `meta_value`) 
VALUES (1375,'_lastlogin', '1497621956')`