How to clear a standby redo logfile and then dropping it

During set up of a physical standby database, one of the standby redo logfiles was marked as "ACTIVE" when querying the v$standby_log:

  THREAD#     GROUP#  SEQUENCE#      BYTES ARCHIVED  STATUS
---------- ---------- ---------- ---------- --------- ------------------------------
         0         12          0 2097152000 YES       UNASSIGNED
         0         13          0 2097152000 YES       UNASSIGNED
         0         14          0 2097152000 YES       UNASSIGNED
         0         15          0 2097152000 YES       UNASSIGNED
         0         16          0 2097152000 YES       UNASSIGNED
         0         17          0 2097152000 YES       UNASSIGNED
         0         18          0 2097152000 YES       UNASSIGNED
         1         11     392344 2097152000 YES       ACTIVE

The file is not even existing on my system, but the path was somehow copied from the primary database, which has a different file structure.
The query:

SELECT thread#, group#, sequence#, bytes, archived, status FROM v$standby_log order by thread#, group#;

would return

  GROUP# TYPE                  MEMBER
---------- --------------------- ------------------------------------------------------------
        11 STANDBY               /backup/fast_recovery_area/PRODDB01/onlinelog/stb_redo01.log

The path /backup/fast_recovery_area/PRODDB01/onlinelog doesn't even exist on my server. This makes it impossible to drop and recreate it:

SQL> alter database drop standby logfile group 11;
alter database drop standby logfile group 11
*
ERROR at line 1:
ORA-00313: open failed for members of log group 11 of thread 1
ORA-00312: online log 11 thread 1:
'/fra/stdb/onlinelog/stb_redo01.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory

Solution: Clear the logfile:

SQL> alter database clear logfile group 11;

Database altered.

Then drop and recreate the standby redo logfile:

SQL> alter database drop standby logfile group 11;

Database altered.

SQL> alter database add standby logfile group 11 ('/data1/oradata/PRODDB01/stb_redo01.log') size 2000M;