Multi-site Cluster LowerQuorumPriorityNodeID

Hi

i have a multi site cluster (Site A with 3 servers Windows 2012 R2) and Site B (1 Windows 2012 R2)

SiteA = SRV1, SRV2, SRV3

SiteB= SRV4

All server include in CLUSTERTEST.

i go in Powershell and type: get-clusternode | ft

i view SRV1 = ID1, SRV2 = ID2, SRV3 = ID3 and SRV4 = ID4

i need to change SRV4 to ID1, because lower priority, i type on srv04 (get-cluster).LowerQuorumPriorityNodeID=1, i have no error but ID not change, why?

Thanks