ORA-32625: illegal dimension in cell reference predicate

create table tq84_ora_32625 (
   dim   char(1),
   m_1   number,
   m_2   number
);

begin

   insert into tq84_ora_32625 values ('A',  100,  4);
   insert into tq84_ora_32625 values ('B',  200,  8);
   insert into tq84_ora_32625 values ('C', -300,  7);
   insert into tq84_ora_32625 values ('Y',  -17,  6);
   insert into tq84_ora_32625 values ('Z',   22,  5);

   commit;
end;
/

select
   *
from
   tq84_ora_32625 model
   dimension by (dim)
   measures     (m_1, m_2)
  (
     m_1[dim > 'Q'] = null
   )
;
--
-- D        M_1        M_2
-- - ---------- ----------
-- A        100          4
-- B        200          8
-- C       -300          7
-- Y                     6
-- Z                     5

select
   *
from
   tq84_ora_32625 model
   dimension by (dim)
   measures     (m_1, m_2)
  (
     m_2[m_1 < 0] = null
  )
;

drop table tq84_ora_32625;