Why is sequence 0006 not used?

In this file,
https://github.com/VisualComputingInstitute/vkitti3D-dataset/blob/master/tools/create_sets.py

I see that sequence 0006 is not used as part of the 6 subsequences you use for training and cross validation. I'm using your split in my experiments, so I'm wondering why you excluded sequence 0006.