Duplicate posting to WBS element

Hi Friends

We have implemented Plant Maintenance module, which is highly integrated to Controlling.

1. There are Work orders that settles to WBS element (Statistical).

Once the Technician confirms the hours, activity allocation posting happens between Cost center and Work order, but at the same time same posting also gets posting to WBS element with Value type 4, which we dont want.

is there a way we can prevent having duplicate posting to WBS element?

Thanks in advance.