[rank0]: File "/root/LLM/ms-swift/swift/llm/utils/preprocess.py", line 45, in new_preprocess
[rank0]: row = preprocess(self, row)
[rank0]: File "/root/LLM/ms-swift/swift/llm/utils/preprocess.py", line 232, in preprocess
[rank0]: conversations = d[self.conversations_key]
[rank0]: File "/root/miniconda3/envs/swift/lib/python3.9/site-packages/datasets/formatting/formatting.py", line 271, in getitem
[rank0]: value = self.data[key]
[rank0]: KeyError: 'messages'

数据集格式为
{"messages": [{"role": "user", "content": "aaaaa"}, {"role": "assistant", "content": "bbbbb"}, {"role": "user", "content": "ccccc"}, {"role": "assistant", "content": "ddddd"}]}

应该是这个语句报错了 上面一个preprocess 解析出来的dataset没有这个key 请问这里为什么还要preprocess一次