These are the changes in pandas 1.2.5. See :ref:`release` for a full changelog including other versions of pandas.
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- Regression in :func:`concat` between two :class:`DataFrames` where one has an :class:`Index` that is all-None and the other is :class:`DatetimeIndex` incorrectly raising (:issue:`40841`)
.. contributors:: v1.2.4..v1.2.5|HEAD