Duplicate View Reference Categories?

I seem to have two different View Reference categories with identical names. Does anyone know how this may have happened?

Which version of Dynamo are you using?

Dynamo Core version: 2.0.3.8810
Dynamo Revit version: 2.0.3.8811
Revit version: 2019.2

It is also occurring in:
Dynamo Core version: 2.5.0.7460
Dynamo Revit version: 2.5.0.7586
Revit version: 2021