The data normalisation in line 127 does not normalise the last edge attribute, which corresponds to "payment format" . This is a desired behaviour if no ports nor time deltas are added. However, when ports or time deltas are added, the last edge attribute would not be "payment format" anymore and required normalisation.
https://github.com/IBM/Multi-GNN/blob/252b0252afca109d1d216c411c59ff70753b25fc/data_loading.py#L108-L127
The data normalisation in line 127 does not normalise the last edge attribute, which corresponds to "payment format" . This is a desired behaviour if no ports nor time deltas are added. However, when ports or time deltas are added, the last edge attribute would not be "payment format" anymore and required normalisation.