Adding new class to DNN face detector

Not related to your problem, but I am also trying to train Caffe+SSD model using that guide. While training I am getting this error:

I0427 08:47:07.764628    26 net.cpp:283] Network initialization done.
[libprotobuf ERROR google/protobuf/text_format.cc:307] Error parsing text-format caffe.NetParameter: 1813:9: Message type "caffe.DetectionOutputParameter" has no field named "clip".

Can you help me fix this if you had similar issue? Thanks