Double bake with user attributes

Hi.

I'm trying to produce controllers for geometry (triangle polyline) with an ID (pasted in user attributes).

If there are already some controllers in the model, i define them via Dynamic pipeline node (Human plug-in), extract their IDs, sort them, add 1 to the last ID and bake a new one with a new ID.

The aim is to know the order controllers were produced in the model.

the problem is that triangles are baked twice every time. If i bake a single triangle, I've got two of them in the model.

How can it be fixed?