A value which uniquely identifies this conceptual
row in the wfmpsConfigTable. The 'wfmpsNextIndex' object
needs to be used to determine the value of this object.
A row cannot be added, unless wfmpsCtrlAtmAddr
is unique.
In the event of an MPS re-initialization, the value
of this wfmpsIndex must remain the same. However, in
the event of an agent re-initialization, this value
does not need to be preserved.