dor-bernstein opened a new issue, #52245:
URL: https://github.com/apache/airflow/issues/52245
### Apache Airflow version
3.0.2
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
I have a dag in airflow 2.10.4 that is defined like this:
```python
from airflow.utils.task_group import TaskGroup
from airflow import DAG
with DAG as dag:
with Taskgroup(group_id='tg1') as tg1:
t1 = EmptyOperator(task_id='t1', dag=dag)
with Taskgroup(group_id='tg2') as tg2:
t2= EmptyOperator(task_id='t2', dag=dag)
t1 >> t2
```
The dag renders successfully but t2 fails with the following error:
Cycle detected in DAG
t2.set_upstream(t1) works but t1.set_downstream(t2) doesn't work
### What you think should happen instead?
The >> operator should work as it was in 2.10
### How to reproduce
I have a dag in airflow 2.10.4 that is defined like this:
```python
from airflow.utils.task_group import TaskGroup
from airflow import DAG
with DAG as dag:
with Taskgroup(group_id='tg1') as tg1:
t1 = EmptyOperator(task_id='t1', dag=dag)
with Taskgroup(group_id='tg2') as tg2:
t2= EmptyOperator(task_id='t2', dag=dag)
t1 >> t2
```
The dag renders successfully but t2 fails with the following error:
Cycle detected in DAG
t2.set_upstream(t1) works but t1.set_downstream(t2) doesn't work
### Operating System
airflow official docker
### Versions of Apache Airflow Providers
_No response_
### Deployment
Docker-Compose
### 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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