Have you seen a scenario where when you copy a activity with project estimate the newly created activity ended up with estimate value from the original activity which cannot be deleted from the application.
Test Plan
Copy a project activity where you have some transactions. make sure to define a estimate for a cost element.
The newly created activity will have a value in the cost with the estimate value.
But the estimate tab is empty
Have to delete from backend to solve the issue. in App10 UPD9