vatsrahul1001 opened a new pull request, #71100:
URL: https://github.com/apache/airflow/pull/71100
Reverts #70791.
#70791 capped pandas to `<3` and made `DBDagBag`/serde **refuse** DataFrame
XComs at runtime on pandas 3. The direction agreed with the maintainers (Ash,
Jarek) is to instead **support** pandas 3 for DataFrame XComs via #70558
(register both `pandas.core.frame.DataFrame` and `pandas.DataFrame` so XComs
written by either pandas major stay readable), rather than mandate the user's
pandas version and refuse their XComs.
This revert removes the cap + runtime refusal so #70558 can land cleanly on
top. `backport-to-v3-3-test` is set so the same revert flows to `v3-3-test` for
3.3.1; it should land together with (or after) the #70558 backport so the
branch is never left with pandas 3 reachable but unsupported.
Note: #70974 ("make serde errors more actionable") is a **general**
serde-error-message improvement, independent of the pandas cap, and is
intentionally **not** reverted.
##### Was generative AI tooling used to co-author this PR?
- [X] Yes — Claude Code (Opus 4.8)
Generated-by: Claude Code (Opus 4.8) following [the
guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)
— clean `git revert` of #70791.
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