TJaniF commented on issue #48629:
URL: https://github.com/apache/airflow/issues/48629#issuecomment-2769497332
The parameter also does not work for regular tasks across dag runs
```
from airflow.sdk import dag
from airflow.decorators import task
from datetime import datetime
@dag()
def parallel_test():
@task(max_active_tis_per_dag=1)
def my_task():
import time
time.sleep(60)
print(datetime.now())
my_task()
parallel_test()
```

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