fix.cs

// get all reference with connector 1
            List<Autodesk.Revit.DB.Connector> connectorSets = connectors1.Select(x => x.AllRefs)
                .SelectMany(x => x.Cast<Autodesk.Revit.DB.Connector>())
                .ToList();
            // disconnect all reference with connector 1
            connectors1.ForEach(x =>
            {
                connectorSets.ForEach(a =>
                {
                    if (x.IsConnectedTo(a))
                    {
                        x.DisconnectFrom(a);
                    }
                });
            });
            // regenerate