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Database error ------ SQL: SELECT UF.*, MEM.uid, MEM.user_name, MEM.url_token, MEM.avatar_file, MEM.reputation, MEM.agree_count, MEM.thanks_count, MEM.url_token, MEB.* FROM aws_user_follow AS UF LEFT JOIN aws_users AS MEM ON UF.friend_uid = MEM.uid LEFT JOIN aws_users_attrib AS MEB ON UF.friend_uid = MEB.uid WHERE fans_uid = 1 AND MEM.uid > 0 AND (MEM.group_id <> 3 AND MEM.forbidden = 0) ORDER BY UF.add_time DESC LIMIT 100 Error Message: Mysqli prepare error: Unknown column 'MEM.url_token' in 'field list'现在后台可以访问 ，前台访问就出这个错误 是需要重新安装 不能升级的意思么
