Missing keys & unexpected keys in state_dict when loading self trained model

vision
2

The Traceback:

Traceback (most recent call last):
  File "classifier.py", line 98, in <module>
    main(args)
  File "classifier.py", line 78, in main
    _im, im = Classifier(args.model).infer(args.image)
  File "classifier.py", line 48, in __init__
    arch.load_state_dict(checkpoint['state_dict'])
  File "/home/xxx/.local/lib/python3.6/site-packages/torch/nn/modules/module.py", line 721, in load_state_dict
    self.__class__.__name__, "\n\t".join(error_msgs)))