ccoliu opened a new pull request, #71823:
URL: https://github.com/apache/airflow/pull/71823
<!-- SPDX-License-Identifier: Apache-2.0
https://www.apache.org/licenses/LICENSE-2.0 -->
When `core.multi_team = True`, calling `Variable.set(key="k", value="v2",
team_name="team_a")` on an existing variable rewrites `team_name` to `"team_a"`
in the `ON CONFLICT (key) DO UPDATE` clause.
This overwrites the original ownership of existing global variables (or
variables belonging to other teams), causing subsequent global lookups (e.g.
`Variable.get("k")` without `team_name`, as done during DAG parsing) to fail
with `KeyError`.
This PR removes `team_name` from `update_fields` in `Variable.set()`,
preserving the original `team_name` ownership of existing variables during
value updates.
closes: #71810
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