name 'PreTrainedModel' is not defined；from diffusers import AutoencoderKL

[TiSgrc]

Traceback (most recent call last):
File "/root/DGInStyle/demo.py", line 17, in
from diffusers import AutoencoderKL
File "", line 1075, in _handle_fromlist
File "/root/miniconda3/lib/python3.10/site-packages/diffusers/utils/import_utils.py", line 701, in getattr
value = getattr(module, name)
File "/root/miniconda3/lib/python3.10/site-packages/diffusers/utils/import_utils.py", line 700, in getattr
module = self._get_module(self._class_to_module[name])
File "/root/miniconda3/lib/python3.10/site-packages/diffusers/utils/import_utils.py", line 712, in _get_module
raise RuntimeError(
RuntimeError: Failed to import diffusers.models.autoencoder_kl because of the following error (look up to see its traceback):
name 'PreTrainedModel' is not defined