my_face_rating error

[vengex]

Warning (from warnings module):
File "C:\Python27\lib\site-packages\sklearn\base.py", line 253
UserWarning)
UserWarning: Trying to unpickle estimator DecisionTreeRegressor from version pre-0.18 when using version 0.20.3. This might lead to breaking code or invalid results. Use at your own risk.

Traceback (most recent call last):
File "C:\Python27\predict-facial-attractiveness-master\source\myPredict.py", line 7, in
clf = joblib.load(root+'model\my_face_rating.pkl')
File "C:\Python27\lib\site-packages\sklearn\externals\joblib\numpy_pickle.py", line 596, in load
return load_compatibility(fobj)
File "C:\Python27\lib\site-packages\sklearn\externals\joblib\numpy_pickle_compat.py", line 226, in load_compatibility
obj = unpickler.load()
File "C:\Python27\lib\pickle.py", line 864, in load
dispatchkey
File "C:\Python27\lib\site-packages\sklearn\externals\joblib\numpy_pickle_compat.py", line 177, in load_build
Unpickler.load_build(self)
File "C:\Python27\lib\pickle.py", line 1223, in load_build
setstate(state)
File "sklearn\tree_tree.pyx", line 649, in sklearn.tree._tree.Tree.setstate
KeyError: 'max_depth'