the version of pytorch-lighting and torchmetrics

[Mirage2000i]

my env：python=3.6，torch=1.8.1，torchvision=0.9.1，pytorch-lightning=1.3.3，but i found the torchmetrics doesn't work,like this:
Traceback (most recent call last):
File "train.py", line 17, in
import pytorch_lightning as pl
File "/home/bread/anaconda3/envs/pl/lib/python3.6/site-packages/pytorch_lightning/init.py", line 20, in
from pytorch_lightning import metrics # noqa: E402
File "/home/bread/anaconda3/envs/pl/lib/python3.6/site-packages/pytorch_lightning/metrics/init.py", line 15, in
from pytorch_lightning.metrics.classification import ( # noqa: F401
File "/home/bread/anaconda3/envs/pl/lib/python3.6/site-packages/pytorch_lightning/metrics/classification/init.py", line 14, in
from pytorch_lightning.metrics.classification.accuracy import Accuracy # noqa: F401
File "/home/bread/anaconda3/envs/pl/lib/python3.6/site-packages/pytorch_lightning/metrics/classification/accuracy.py", line 18, in
from pytorch_lightning.metrics.utils import deprecated_metrics
File "/home/bread/anaconda3/envs/pl/lib/python3.6/site-packages/pytorch_lightning/metrics/utils.py", line 22, in
from torchmetrics.utilities.data import get_num_classes as _get_num_classes
ImportError: cannot import name 'get_num_classes'
,then i change the version of torchmetrics to 0.4.1,it work,but the results are very low,
DATALOADER:0 TEST RESULTS
{'img_auc': 0.6432748538011696, 'pixel_auc': 0.3221238380546673}
i don't know why