Maintaining the Standard Available Capacity 
Prerequisites
You have already assigned the capacities whose
standard available capacity you want to maintain to the resource. You have already entered the general data for this capacity.Procedure
The Header screen of the capacity you selected appears.

If a version of available capacity is active, the system uses it instead of the standard available capacity. An entry in the Active Version field of the Header screen tells you that a version of available capacity is active. If you want the system to use the standard available capacity, you must delete this entry.