diff --git a/core/net/src/main/java/org/onosproject/net/pi/impl/PiReplicationGroupTranslatorImpl.java b/core/net/src/main/java/org/onosproject/net/pi/impl/PiReplicationGroupTranslatorImpl.java
index 1f562a4..53fb9d2 100644
--- a/core/net/src/main/java/org/onosproject/net/pi/impl/PiReplicationGroupTranslatorImpl.java
+++ b/core/net/src/main/java/org/onosproject/net/pi/impl/PiReplicationGroupTranslatorImpl.java
@@ -118,7 +118,7 @@
             // Use incremental instance IDs for replicas of the same port.
             replicaMap.putIfAbsent(port, Sets.newHashSet());
             replicaMap.get(port).add(
-                    new PiPreReplica(port, replicaMap.get(port).size() + 1));
+                    new PiPreReplica(port, replicaMap.get(port).size()));
         }
         return replicaMap.values().stream()
                 .flatMap(Collection::stream)