3-mitigate-bias-train-model2-registry-e2e.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/end_to_end/3-mitigate-bias-train-model2-registry-e2e.ipynb

Error:

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Exception encountered at "In [6]":
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NameError Traceback (most recent call last)
in
1 # variables used for parameterizing the notebook run
----> 2 model_2_name = f'{prefix}-xgboost-post-smote'
3
4 train_data_upsampled_s3_path = f's3://{bucket}/{prefix}/data/train/upsampled/train.csv'
5 bias_report_2_output_path = f's3://{bucket}/{prefix}/clarify-output/bias-2'

NameError: name 'prefix' is not defined

Open end_to_end/3-mitigate-bias-train-model2-registry-e2e.ipynb and inspect cell In [6], then trace where prefix is expected to be defined. Rerun the notebook or CI check and confirm the cell completes without the reported NameError.

Written by the indexing model from the issue text.