keras-team/keras · error · AttributeError

The `sparse` attribute of KerasTensor is immutable. One shou

Error message

The `sparse` attribute of KerasTensor is immutable. One should create a new instance of KerasTensor for this.

What it means

Error "The `sparse` attribute of KerasTensor is immutable. One should create a new instance of KerasTensor for this." thrown in keras-team/keras.

Source

Thrown at keras/src/backend/common/keras_tensor.py:97

    @property
    def dtype(self):
        return self._dtype

    @dtype.setter
    def dtype(self, value):
        raise AttributeError(
            "The `dtype` attribute of KerasTensor is immutable. One should "
            "create a new instance of KerasTensor for this."
        )

    @property
    def sparse(self):
        return self._sparse

    @sparse.setter
    def sparse(self, value):
        raise AttributeError(
            "The `sparse` attribute of KerasTensor is immutable. One should "
            "create a new instance of KerasTensor for this."
        )

    @property
    def ragged_rank(self):
        return self._ragged_rank

    @ragged_rank.setter
    def ragged_rank(self, value):
        raise AttributeError(
            "The `ragged_rank` attribute of KerasTensor is immutable. One "
            "should create a new instance of KerasTensor for this."
        )

    @property
    def row_splits_dtype(self):
        return self._row_splits_dtype

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/common/keras_tensor.py:97 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/cdf9f2a87711f8f5. Report an issue: GitHub.