The error of Evaluation I met

[SSZ1]

I use the command:
python tools/test.py configs/polarmask/4gpu/polar_768_1x_r50.py /opt/data/private/SSZ/test/PolarMask/result/20220516complete/60epoch/epoch_60.pth --out /opt/data/private/SSZ/test/PolarMask/result/20220516complete/60epoch/results.pkl --eval segm

and get the error: IndexError: list index out of range

The details are as follows:

(testpy37) root@interactive85669:/opt/data/private/SSZ/test/PolarMask/PolarMask# python tools/test.py configs/polarmask/4gpu/polar_768_1x_r50.py /opt/data/private/SSZ/test/PolarMask/result/20220516complete/60epoch/epoch_60.pth --out /opt/data/private/SSZ/test/PolarMask/result/20220516complete/60epoch/results.pkl --eval segm
loading annotations into memory...
Done (t=0.09s)
creating index...
index created!
/opt/data/private/SSZ/test/PolarMask/PolarMask/mmdet/models/anchor_heads/polarmask_head.py:72: UserWarning: torch.range is deprecated in favor of torch.arange and will be removed in 0.5. Note that arange generates values in [start; end), not [start; end].
self.angles = torch.range(0, 350, 10).cuda() / 180 * math.pi
[>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>] 60/60, 0.3 task/s, elapsed: 172s, ETA: 0s
writing results to /opt/data/private/SSZ/test/PolarMask/result/20220516complete/60epoch/results.pkl
Starting evaluate segm
Traceback (most recent call last):
File "tools/test.py", line 225, in
main()
File "tools/test.py", line 201, in main
result_files = results2json(dataset, outputs, args.out)
File "/opt/data/private/SSZ/test/PolarMask/PolarMask/mmdet/core/evaluation/coco_utils.py", line 165, in results2json
json_results = segm2json(dataset, results)
File "/opt/data/private/SSZ/test/PolarMask/PolarMask/mmdet/core/evaluation/coco_utils.py", line 135, in segm2json
data['category_id'] = dataset.cat_ids[label]
IndexError: list index out of range

So why is this?