Dropping redo log memmbers - oracle 11gR2

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/appl/oradata/xdb01/CprodD/CprodD_redo03a.rdo
/appl/oradata/xdb02/CprodD/CprodD_redo03b.rdo
/appl/oradata/xdb01/CprodD/CprodD_redo02a.rdo
/appl/oradata/xdb02/CprodD/CprodD_redo02b.rdo
/appl/oradata/xdb01/CprodD/CprodD_redo01a.rdo
/appl/oradata/xdb02/CprodD/CprodD_redo01b.rdo

6 rows selected.

SQL> alter database drop logfile member '/appl/oradata/xdb02/CprodD/CprodD_redo03b.rdo';
alter database drop logfile member '/appl/oradata/xdb02/CprodD/CprodD_redo03b.rdo'
*
ERROR at line 1:
ORA-01609: log 3 is the current log for thread 1 - cannot drop members
ORA-00312: online log 3 thread 1:
'/appl/oradata/xdb01/CprodD/CprodD_redo03a.rdo'
ORA-00312: online log 3 thread 1:
'/appl/oradata/xdb02/CprodD/CprodD_redo03b.rdo'

The above can be deleted after switching the current log file.

SQL>  alter database drop logfile member '/appl/oradata/xdb02/CprodD/CprodD_redo02b.rdo';

Database altered.

SQL> alter database drop logfile member '/appl/oradata/xdb02/CprodD/CprodD_redo01b.rdo';

Database altered.

SQL> alter system checkpoint;

System altered.

SQL> alter system switch logfile;

System altered.

SQL>  alter database drop logfile member '/appl/oradata/xdb02/CprodD/CprodD_redo03b.rdo';

Database altered.

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/appl/oradata/xdb01/CprodD/CprodD_redo03a.rdo
/appl/oradata/xdb01/CprodD/CprodD_redo02a.rdo
/appl/oradata/xdb01/CprodD/CprodD_redo01a.rdo

SQL>