Oracle Message ORA-22344 - can not specify CONVERT TO SUBSTITUTABLE option for ALTER TYPE other than NOT FINAL change

ERRORcan not specify CONVERT TO SUBSTITUTABLE option for ALTER TYPE other than NOT FINAL change
CAUSEAn attempt was made to specify CONVERT TO SUBSTITUTABLE option for ALTER TYPE other than NOT FINAL change.
ACTIONSpecify CONVERT TO SUBSTITUTABLE option only for ALTER TYPE NOT FINAL change.