当我使用 Optuna 调整模型时，我收到以下警告。请告诉我如何抑制这些警告？
[LightGBM] [Warning] feature_fraction is set=0.2, colsample_bytree=1.0 will be ignored. Current value: feature_fraction=0.2
[LightGBM] [Warning] min_data_in_leaf is set=5400, min_child_samples=20 will be ignored. Current value: min_data_in_leaf=5400
[LightGBM] [Warning] min_gain_to_split is set=13.203719815769512, min_split_gain=0.0 will be ignored. Current value: min_gain_to_split=13.203719815769512