DonHaul opened a new issue, #61381:
URL: https://github.com/apache/airflow/issues/61381
### Apache Airflow version
Other Airflow 3 version (please specify below)
### If "Other Airflow 3 version" selected, which one?
3.1.5
### What happened?
I tried to clear dag and rerun dags that had run in 3.0.6 and I got the
following error:
```2026-02-02T21:05:10.775516Z [error ] Exception when executing
SchedulerJob._run_scheduler_loop
[airflow.jobs.scheduler_job_runner.SchedulerJobRunner]
loc=scheduler_job_runner.py:1083
Traceback (most recent call last):
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/jobs/scheduler_job_runner.py",
line 1079, in _execute
self._run_scheduler_loop()
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/jobs/scheduler_job_runner.py",
line 1369, in _run_scheduler_loop
num_queued_tis = self._do_scheduling(session)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/jobs/scheduler_job_runner.py",
line 1479, in _do_scheduling
callback_tuples = self._schedule_all_dag_runs(guard, dag_runs, session)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/utils/retries.py",
line 97, in wrapped_function
for attempt in run_with_db_retries(max_retries=retries, logger=logger,
**retry_kwargs):
File
"/home/airflow/.local/lib/python3.11/site-packages/tenacity/__init__.py", line
445, in __iter__
do = self.iter(retry_state=retry_state)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/tenacity/__init__.py", line
378, in iter
result = action(retry_state)
^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/tenacity/__init__.py", line
400, in <lambda>
self._add_action_func(lambda rs: rs.outcome.result())
^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/concurrent/futures/_base.py", line 449,
in result
return self.__get_result()
^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/concurrent/futures/_base.py", line 401,
in __get_result
raise self._exception
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/utils/retries.py",
line 106, in wrapped_function
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/jobs/scheduler_job_runner.py",
line 1921, in _schedule_all_dag_runs
callback_tuples = [(run, self._schedule_dag_run(run, session=session))
for run in dag_runs]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/jobs/scheduler_job_runner.py",
line 1921, in <listcomp>
callback_tuples = [(run, self._schedule_dag_run(run, session=session))
for run in dag_runs]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/jobs/scheduler_job_runner.py",
line 2037, in _schedule_dag_run
schedulable_tis, callback_to_run = dag_run.update_state(session=session,
execute_callbacks=False)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/utils/session.py",
line 98, in wrapper
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.11/site-packages/airflow/models/dagrun.py",
line 1184, in update_state
context_from_server=DagRunContext(
^^^^^^^^^^^^^^
File "/home/airflow/.local/lib/python3.11/site-packages/pydantic/main.py",
line 250, in __init__
validated_self = self.__pydantic_validator__.validate_python(data,
self_instance=self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for
DagRunContext
dag_run.start_date
Input should be a valid datetime [type=datetime_type, input_value=None,
input_type=NoneType]
For further information visit
https://errors.pydantic.dev/2.12/v/datetime_type
```
### What you think should happen instead?
Dags should be allowed to be restarted withouth any issues
### How to reproduce
Have dags that had previously run in 3.0.6 .
Upgrade to 3.1.5
Do a call to the [clear dag
run](https://airflow.apache.org/docs/apache-airflow/stable/stable-rest-api-ref.html#operation/clear_dag_run)
api
Error will appear
### Operating System
Debian GNU/Linux 12 (bookworm)
### Versions of Apache Airflow Providers
_No response_
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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