Cannot load "ciao" and "epinions" datasets

When loading the "ciao" and "epinions" datasets with function "load_partition_data", there is an error as follows:

`RuntimeError: The 'data' object was created by an older version of PyG. If this error occurred while loading an already existing dataset, remove the 'processed/' directory in the dataset's root folder and try again.`

Is there any solution to this error?