keyError 'data_time'

[JJY0710]

During the validation process has keyerror data_time

Traceback (most recent call last):
File "/home/project/JT/SegFormer/tools/train.py", line 166, in
main()
File "/home/project/JT/SegFormer/tools/train.py", line 155, in main
train_segmentor(
File "/home/project/JT/SegFormer/mmseg/apis/train.py", line 115, in train_segmentor
runner.run(data_loaders, cfg.workflow)
File "/home/anaconda3/envs/mmdet/lib/python3.9/site-packages/mmcv/runner/iter_based_runner.py", line 134, in run
iter_runner(iter_loaders[i], **kwargs)
File "/home/anaconda3/envs/mmdet/lib/python3.9/site-packages/mmcv/runner/iter_based_runner.py", line 67, in train
self.call_hook('after_train_iter')
File "/home/anaconda3/envs/mmdet/lib/python3.9/site-packages/mmcv/runner/base_runner.py", line 309, in call_hook
getattr(hook, fn_name)(self)
File "/home/anaconda3/envs/mmdet/lib/python3.9/site-packages/mmcv/runner/hooks/logger/base.py", line 153, in after_train_iter
self.log(runner)
File "/home/anaconda3/envs/mmdet/lib/python3.9/site-packages/mmcv/runner/hooks/logger/text.py", line 234, in log
self._log_info(log_dict, runner)
File "/home/anaconda3/envs/mmdet/lib/python3.9/site-packages/mmcv/runner/hooks/logger/text.py", line 154, in _log_info
f'data_time: {log_dict["data_time"]:.3f}, '
KeyError: 'data_time'

[JJY0710]

When delete log_str += f'time: {log_dict["time"]:.3f}, '
f'data_time: {log_dict["data_time"]:.3f}, '
return to normal，what's problem?