生成自定义SequentialDataset数据集时，如果发现.inter中item_id_list为空（即没有历史交互），该如何处理？

[cywuuuu]

Describe the bug
A clear and concise description of what the bug is.
在尝试与baseline比较时，我生成了一份这样的数据集，

我该如何处理？直接运行会报如下错误：

dim < index_size && "index out of bounds"` failed.
../aten/src/ATen/native/cuda/ScatterGatherKernel.cu:144: operator(): block: [221,0,0], thread: [93,0,0] Assertion `idx_dim >= 0 && idx_dim < index_size && "index out of bounds"` failed.
../aten/src/ATen/native/cuda/ScatterGatherKernel.cu:144: operator(): block: [221,0,0], thread: [94,0,0] Assertion `idx_dim >= 0 && idx_dim < index_size && "index out of bounds"` failed.
../aten/src/ATen/native/cuda/ScatterGatherKernel.cu:144: operator(): block: [221,0,0], thread: [95,0,0] Assertion `idx_dim >= 0 && idx_dim < index_size && "index out of bounds"` failed.

求指教谢谢！