loaded state dict contains a parameter group that doesn't match the size of optimizer's group

**Summary[问题简述（一句话）]**
using version v0.0.1,and pretrained model https://pan.baidu.com/s/1PI-hM3sn5wbeChRryX-RCQ 提取码：2021,but occur issue:
ValueError: loaded state dict contains a parameter group that doesn't match the size of optimizer's group

wechat chatting group code expired, new one please

@babysor

Start by reproducing the error with version v0.0.1 and the linked pretrained model, then trace where the optimizer state is loaded. The issue mentions no source file or test, so identify the relevant checkpoint-loading entry point and confirm the parameter-group mismatch. Done means a reproducible diagnosis and documented resolution or reproduction guidance.

Written by the indexing model from the issue text.