Dual Mesh and Clip Vertices nodes failing to work together

Created by: Marcus-Richmond

Problem statement

As part of a node setup, I would like to use the Dual Mesh node connected to the Clip Vertices node, like this:

The following error is from the Debug print node: [ERROR] sverchok.utils.sv_bmesh_utils:541 : faces.new(...): found the same (BMVert) used multiple times

After looking here: https://github.com/nortikin/sverchok/issues/3989, I tried using the following code and mesh clean node, but without any luck:

exec node

mesh clean (I tried the various options with the mesh clean node, but didn't resolve the error)

The Clip Vertices node still works without the Dual Mesh node however:

Seems like without edges being input into the Clip Vertices node, this node returns this error. I tried another setup where the Clip Vertices node was only being passed verts/polygons and no edges:

Again, looking at https://github.com/nortikin/sverchok/issues/3989, I see the discussion is about duplicate faces, but none of these node setups appear to be creating duplicate faces.

Sverchok version

Sverchok 1.1.0 with Blender 3.1.2