keras-team/keras · error · AttributeError

The `dtype` attribute of KerasTensor is immutable. One shoul

Error message

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

What it means

Error "The `dtype` 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:86

    @property
    def shape(self):
        return self._shape

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

    @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

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/common/keras_tensor.py:86 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/8cf0754188c2a157. Report an issue: GitHub.