Overlapping subnet is configured under irb ERROR

EXISTING
set interfaces irb unit 1 family inet address 10.205.35.115/24


CHANGE REQUIRED
set interfaces irb unit 1 family inet address 10.205.35.115/25


STEPS FOLLOWED
delete interfaces irb unit 1 family inet address 10.205.35.115/24
set interfaces irb unit 1 family inet address 10.205.35.115/25


FACING ERROR
error: Overlapping subnet is configured under irb
[edit interfaces irb unit 1 family inet]
  'address 10.205.35.115/25'
error: configuration check-out failed