How can the issue of "KeyError: 'p2'" when attempting to train detectron2 be resolved?

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The "KeyError: 'p2'" issue when attempting to train Detectron2 can be resolved by checking if the dataset has been properly loaded and if the "p2" key is present in the metadata. One possible solution is to modify the metadata to include the "p2" key or add a condition in the code to handle missing keys. Another possible solution is to check if the dataset has been preprocessed and formatted correctly before training. It is also recommended to update to the latest version of Detectron2 and check for any known bugs or issues related to the error.