I am not able to drag a composition from the project panel into a layer in the timeline.

I have duplicated a layer in the timeline. I then want to use the atttributes I have set up on that layer on another composition. The method to achieve this I am told is to drag the composition from the project panel  over the selected layer in the timeline. When I do this my AE 26.3.0 is only adding the composition as a new layer in the timeline, not nesting the new composition within the layer and updating the layer title with the new comp title as expected.