Unique run_id across manually triggered Dags with schedules

[steveahnahn]

Problem

Manual triggers of scheduled Dags could generate the same run_id repeatedly (often aligned to the schedule boundary). Triggering the same Dag twice would then fail with a 409 Conflict due to a duplicate run_id

Solution

When a manual trigger provides a logical_date, Airflow still infers the correct data_interval for the run, but it no longer rewrites run_after to the scheduled data_interval.end. This keeps manual trigger run_ids based on the actual trigger time making them unique across repeated manual triggers.

• Added a regression test that creates a scheduled Dag, triggers it twice, and asserts the returned dag_run_id values are different:

Manual testing in breeze triggering a daily scheduled dag via manual trigger runids:
scheduled__2025-12-15T00:00:00+00:00
manual__2025-12-15T04:16:39.584387+00:00
manual__2025-12-15T04:16:50.627593+00:00
manual__2025-12-15T04:18:07.769612+00:00

Related

Fixes #59342

[bugraoz93]

Thanks Steve, changes looks good! Maybe we should make run_after unique rather than fallback to logicaldate. I remember this was an intentional change. I maybe missing something though

cc: @uranusjr

[pierrejeambrun]

LGTM, just a question.

[pierrejeambrun]

LGTM

[github-actions]

Backport successfully created: v3-1-test

Status	Branch	Result
✅	v3-1-test