Dataloader error: AttributeError: 'Column' object has no attribute 'deferred_dtype'

I was using DGL, and all seem well until I encounter the error :
AttributeError: 'Column' object has no attribute 'deferred_dtype'
I’m wondering why this happened?

I’ve opened a github issue: AttributeError: 'Column' object has no attribute `deferred_dtype` · Issue #4107 · dmlc/dgl · GitHub. For now, downgrading DGL to 0.8.1 should fix the issue.