NotImplementedError: Average pool operation with spatial rank == -2 is not implemented

[pzy2000]

BUG Log:
Traceback (most recent call last):
File "/opt/conda/envs/tf2onnx/lib/python3.7/site-packages/onnx2torch/node_converters/average_pool.py", line 29, in _
avgpool_class = _AVGPOOL_CLASS_FROM_SPATIAL_RANK[spatial_rank]
KeyError: -2

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "issue_onnx2torch_001.py", line 4, in
torch_model = convert(onnx_model_path)
File "/opt/conda/envs/tf2onnx/lib/python3.7/site-packages/onnx2torch/converter.py", line 110, in convert
torch_module, onnx_mapping = converter(onnx_node, onnx_graph)
File "/opt/conda/envs/tf2onnx/lib/python3.7/site-packages/onnx2torch/node_converters/average_pool.py", line 33, in _
) from exc
NotImplementedError: Average pool operation with spatial rank == -2 is not implemented

Code to reproduce:
from onnx2torch import convert

onnx_model_path = "vgg19-imagenet_origin-MDtype4-NLAll9-MDtype24-MDims26.onnx"
torch_model = convert(onnx_model_path)

the onnx file can be acquired at https://drive.google.com/file/d/1lfGz41_pFvQwJYsZxuPPX53dLzzWYKBx/view?usp=sharing