OS: Win 11
Build Version: 20250807.1
Regression: Not a Regression

Repro Steps:

1. Create a durable project with "Durable Task Scheduler (Preview)" durable storage type selected.
2. Open local.settings.json file of this project.
3. Check there is no extra setting "%TASKHUB_NAME%": "".

Expect:
There is no extra setting "%TASKHUB_NAME%": "" in local.settings.json file.

Actual:
There is an extra setting "%TASKHUB_NAME%": "" in local.settings.json file.

More Info:

1. Debug this project -> Click "Manually Set a Connection String" button -> Provide DTS connection string and Taskhub name, it will add another setting "TASKHUB_NAME": "xxx".