Version 1.x mmocr reports an error when outputting best_checkponts

[136LYJ]

Prerequisite

• I have searched Issues and Discussions but cannot get the expected help.
• The bug has not been fixed in the latest version (0.x) or latest version (1.x).

Task

I'm using the official example scripts/configs for the officially supported tasks/models/datasets.

Branch

main branch https://github.com/open-mmlab/mmocr

Environment

1.x version

Reproduces the problem - code sample

default_runtime.py

default_hooks = dict(
timer=dict(type='IterTimerHook'),
logger=dict(type='LoggerHook', interval=50),
param_scheduler=dict(type='ParamSchedulerHook'),
checkpoint=dict(type='CheckpointHook',interval=1,by_epoch=True, save_best=["word_acc","word_acc_ignore_case"], rule="greater"),
sampler_seed=dict(type='DistSamplerSeedHook'),
sync_buffer=dict(type='SyncBuffersHook'),
# show pictures, not table
visualization=dict(
type='VisualizationHook',
interval=10,
enable=False,
show=False,
draw_gt=False,
draw_pred=False),
)

Reproduces the problem - command or script

、

Reproduces the problem - error message

Traceback (most recent call last):
File "tools/train.py", line 114, in
main()
File "tools/train.py", line 110, in main
runner.train()
File "/home/lianyj/miniconda3/envs/open-mmlab/lib/python3.8/site-packages/mmengine/runner/runner.py", line 1745, in train
model = self.train_loop.run() # type: ignore
File "/home/lianyj/miniconda3/envs/open-mmlab/lib/python3.8/site-packages/mmengine/runner/loops.py", line 102, in run
self.runner.val_loop.run()
File "/home/lianyj/miniconda3/envs/open-mmlab/lib/python3.8/site-packages/mmengine/runner/loops.py", line 367, in run
self.runner.call_hook('after_val_epoch', metrics=metrics)
File "/home/lianyj/miniconda3/envs/open-mmlab/lib/python3.8/site-packages/mmengine/runner/runner.py", line 1807, in call_hook
getattr(hook, fn_name)(self, **kwargs)
File "/home/lianyj/miniconda3/envs/open-mmlab/lib/python3.8/site-packages/mmengine/hooks/checkpoint_hook.py", line 361, in after_val_epoch
self._save_best_checkpoint(runner, metrics)
File "/home/lianyj/miniconda3/envs/open-mmlab/lib/python3.8/site-packages/mmengine/hooks/checkpoint_hook.py", line 505, in _save_best_checkpoint
key_score = metrics[key_indicator]
KeyError: 'word_acc'

Additional information

No response