Rust from/into generic impl

Error.txt

error[E0119]: conflicting implementations of trait `std::convert::Into<ggez::graphics::Rect>` for type `&_`:
   --> src\dungeongen\rooms.rs:143:1
    |
143 | impl<'a, T: CenterOriginRect> Into<Rect> for &'a T {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: conflicting implementation in crate `core`:
            - impl<T, U> std::convert::Into<U> for T
              where U: std::convert::From<T>;
    = note: downstream crates may implement trait `std::convert::From<&_>` for type `ggez::graphics::Rect`

error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g. `MyStruct<T>`); only traits defined in the current crate can be implemented for a type parameter
   --> src\dungeongen\rooms.rs:143:1
    |
143 | / impl<'a, T: CenterOriginRect> Into<Rect> for &'a T {
144 | |   fn into(self) -> Rect {
145 | |     Rect {
146 | |       // GGEZ Rects have a top-left origin
...   |
152 | |   }
153 | | }
    | |_^

error: aborting due to 2 previous errors

example.rs

trait CenterOriginRect {
  fn center(&self) -> Point;
  fn width(&self) -> Meters;
  fn height(&self) -> Meters;
}

impl CenterOriginRect for Room {
  fn center(&self) -> Point { self.center }
  fn width(&self) -> f32 { self.width }
  fn height(&self) -> f32 { self.height }
}

impl<'a, T: CenterOriginRect> Into<Rect> for &'a T {
  fn into(self) -> Rect {
    Rect {
      x: self.center().x - self.width() / 2.0,
      y: self.center().y - self.height() / 2.0,
      w: self.width(),
      h: self.height(),
    }
  }
}