paddleX从1.7 升级到 2.0 后，老版本代码 报错，怎么处理？ 如何版本指定加载？

Exception: Current version is 2.0.0rc4, a model trained by PaddleX=1.2.8 cannot be load.

-----------------------------报错------------------------------------------------

D:\Anaconda3\lib\site-packages\win32\lib\pywintypes.py:2: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
import imp, sys, os
D:\Anaconda3\lib\site-packages\paddle\distributed\parallel.py:119: UserWarning: Currently not a parallel execution environment, `paddle.distributed.init_parallel_env` will not do anything.
"Currently not a parallel execution environment, `paddle.distributed.init_parallel_env` will not do anything."
。。。。。
model = pdx.load_model('inference_model')
File "D:\Anaconda3\lib\site-packages\paddlex\cv\models\load_model.py", line 69, in load_model
format(paddlex.__version__, version))
Exception: Current version is 2.0.0rc4, a model trained by PaddleX=1.2.8 cannot be load.