[Python] How to save and load TensorFlow Decision forest model for incremental learning?

I am developing TensorFlow decision forest regression model for incremental learning, So I have developed the model and have saved the model. When I retrain with new data the error is coming like "ValueError: The model's task attribute (CLASSIFICATION) does not match the task attribute passed to pd_dataframe_to_tf_dataset (REGRESSION)."

I have tried saving it in different format, but still getting the error.

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