Far Backward Arb8 error

This seems like a degenerate arb8.

#25 136.2 Error in <TGeoArb8::ComputeTwist>: Shape TGeoArb8 type Arb8: Vertices must be defined clockwise in XY planes. Re-ordering...
#25 136.2 Error in <TGeoArb8::ComputeTwist>: Shape TGeoArb8 type Arb8: Malformed polygon with crossing opposite segments
#25 144.5 *** Shape TGeoArb8: TGeoArb8 ***
#25 144.5     point #0 : x=  -66.27951 y=-2399.27697 z=  -20.00000
#25 144.5     point #1 : x=   -9.80000 y=-1486.50000 z=  -20.00000
#25 144.5     point #2 : x=   -9.80000 y=-1486.50000 z=  -20.00000
#25 144.5     point #3 : x=  -26.28605 y=-2400.00000 z=  -20.00000
#25 144.5     point #4 : x=  -66.27951 y=-2399.27697 z=   20.00000
#25 144.5     point #5 : x=   -9.80000 y=-1486.50000 z=   20.00000
#25 144.5     point #6 : x=   -9.80000 y=-1486.50000 z=   20.00000
#25 144.5     point #7 : x=  -26.28605 y=-2400.00000 z=   20.00000
#25 144.5  Bounding box:
#25 144.5 *** Shape TGeoArb8: TGeoBBox ***
#25 144.5     dX =     0.00000
#25 144.5     dY =     0.00000
#25 144.5     dZ =     0.00000
#25 144.5     origin: x=    0.00000 y=    0.00000 z=    0.00000