diff --git a/src/ga4gh/vrs/models.py b/src/ga4gh/vrs/models.py
index b0ec9126..2959b577 100644
--- a/src/ga4gh/vrs/models.py
+++ b/src/ga4gh/vrs/models.py
@@ -565,7 +565,6 @@ def ga4gh_serialize(self) -> Dict:
 
     class ga4gh(_Ga4ghIdentifiableObject.ga4gh):
         prefix = 'CPB'
-        priorPrefix = {'1.3': 'VH'}
         keys = [
             'members',
             'type'