cannot specialize const trait impl with non-const

[Hezuikn-2]

#![feature(const_trait_impl, min_specialization)]

#[allow(dead_code)]
#[const_trait]
trait Trait {
    fn item();
}

impl<T> const Trait for T {
    default fn item() {}
}

// works when adding const here too
impl Trait for () {
    fn item() {}
}

fn main() {}

error[E0119]: conflicting implementations of trait `Trait` for type `()`
  --> conflict.rs:14:1
   |
 9 | impl<T> const Trait for T {
   | ------------------------- first implementation here
...
14 | impl Trait for () {
   | ^^^^^^^^^^^^^^^^^ conflicting implementation for `()`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0119`.

rustc 1.92.0-nightly (4082d6a3f 2025-09-27)

i would like to expect this to work it may however be intentional behaviour