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32119.Fix

doc/whats_new/upcoming_changes/sklearn.tree/32119.fix.rst

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  • Fix calculation of node impurity in :class:tree.DecisionTreeRegressor, :class:ensemble.RandomForestRegressor, :class:ExtraTreeRegressor and :class:ExtraTreesRegressor when missing values are present for the Poisson criterion. The Poisson criterion was returning invalid impurities (including negative values) when missing values were present. By :user:Arthur Lacote <cakedev0>