### Godot version

v4.0 rc6

### System information

Windows 10

### Issue description

When using a ViewportTexture from a SubViewport on a TextureRect, it throws errors after running the scene once and then switching scenes in the editor.
![Pasted image 20230227212626](https://user-images.githubusercontent.com/44676282/221680047-984fa03e-33d1-4856-9a7f-1700b28423cf.png)


### Steps to reproduce

Run the canvas-scene once.
Switch to another scene in the editor.
Switch back to the canvas-scene

### Minimal reproduction project

[ViewportTextureError.zip](https://github.com/godotengine/godot/files/10844099/ViewportTextureError.zip)

_cleanup_mouseover_colliders(true, p_paused_only);
#ifndef _3D_DISABLED
	if (physics_object_over.is_valid()) {
		CollisionObject3D *co = Object::cast_to<CollisionObject3D>(ObjectDB::get_instance(physics_object_over));
		if (co) {
			if (!co->is_inside_tree()) {
				physics_object_over = ObjectID();
				physics_object_capture = ObjectID();
			} else if (!(p_paused_only && co->can_process())) {
				co->_mouse_exit();
				physics_object_over = ObjectID();
				physics_object_capture = ObjectID();
			}
		}
	}
#endif 
}
void Viewport::_cleanup_mouseover_colliders(bool p_clean_all_frames, bool p_paused_only, uint64_t p_frame_reference) {