Unable to remove incorrect expenditure type from Burden Structure attached to the Burden Schedule

Summary:

User incorrectly added a new expenditure type to a burden structure attached to the active burden schedule. When the user tried removing the expenditure type, Oracle is not allowing to remove the expenditure type. As a workaround user copied and created a new Burden Structure without the incorrect expenditure type. It works for the standard burden schedules, however the Award Projects which have overrides are still referring to the older burden structure.
We need help with the below:

• Is there a way we can remove the incorrect expenditure type added from the original burden structure?

• If not, is there a way to mass update overrides and recalculate the burden costs?