急--Oracle 游标数据遍历的问题？（有代码）

先上代码：  create or replace procedure USERRATELIST is
      TYPE type_cur IS REF CURSOR; --定义游标
      cur       type_cur; --返回的数据集
      V_Version varchar2(38); --版本编号
      V_TypeID  varchar2(38); --类型编号
      V_detail  varchar2(1000); --条件编号
begin
      open cur for
            select  c.numtype, c.typeguid, c.condition from CONDITIONTYPE c;
      loop
            fetch cur
                  into V_Version, V_TypeID, V_detail;
                  dbms_output.put_line(V_detail);
                  exit when cur%Notfound;
                  insert into RATEUSERTABLE
                        (ID,
                         CUSTOMERGUID,
                         NUMTYPE,
                         TYPEGUID,
                         RATENUM,
                         ISUSEDATE,
                         CREATEDATE,
                         CREATER)
                        (select   f_createguid,
                                u.customerguid,
                                V_Version,
                                V_TypeID,
                                ''   rate,
                                trunc(sysdate) isusedate,
                                sysdate,
                                'system' creater
                           from USERPREFERETIALTABLE  u
                          where   u.ptype=V_detail    group by u.customerguid );
                  commit;
       end loop;
      if cur%isopen then
            close cur;
      end if;
end USERRATELIST;CONDITIONTYPE   这个表里面有4条记录，但是在执行插入的时候，执行了5次，最后一条记录重复执行了2次（红色的输出结果显示最后一条记录输出了2次）？
在线等结果~！（以前这样写都没问题的）