Leave beacons in your code. I would have avoided a silly error if a variable named xgb_train_data would have been named, for example, xgb_train_data_filepath instead. When you can’t leave globally unique, persistent, resolvable identifiers (GUPRIs), mind your beacons. References: F. Hermans, The Programmer’s brain: what every programmer needs to know about cognition , pp28-30. Shelter Island, NY: Manning, 2021.