diff --git a/pkg/roachpb/metadata.go b/pkg/roachpb/metadata.go
index 0c8a86e5985d..7929bb778711 100644
--- a/pkg/roachpb/metadata.go
+++ b/pkg/roachpb/metadata.go
@@ -145,7 +145,12 @@ func (r *RangeDescriptor) SetReplicaType(
 		desc := &r.InternalReplicas[i]
 		if desc.StoreID == storeID && desc.NodeID == nodeID {
 			prevTyp := desc.GetType()
-			desc.Type = &typ
+			if typ != VOTER_FULL {
+				desc.Type = &typ
+			} else {
+				// For 19.1 compatibility.
+				desc.Type = nil
+			}
 			return *desc, prevTyp, true
 		}
 	}
@@ -157,11 +162,16 @@ func (r *RangeDescriptor) SetReplicaType(
 func (r *RangeDescriptor) AddReplica(
 	nodeID NodeID, storeID StoreID, typ ReplicaType,
 ) ReplicaDescriptor {
+	var typPtr *ReplicaType
+	// For 19.1 compatibility, use nil instead of VOTER_FULL.
+	if typ != VOTER_FULL {
+		typPtr = &typ
+	}
 	toAdd := ReplicaDescriptor{
 		NodeID:    nodeID,
 		StoreID:   storeID,
 		ReplicaID: r.NextReplicaID,
-		Type:      &typ,
+		Type:      typPtr,
 	}
 	rs := r.Replicas()
 	rs.AddReplica(toAdd)
diff --git a/pkg/storage/batcheval/cmd_end_transaction.go b/pkg/storage/batcheval/cmd_end_transaction.go
index 7ba85f0ecab5..e4ac95b1f9e3 100644
--- a/pkg/storage/batcheval/cmd_end_transaction.go
+++ b/pkg/storage/batcheval/cmd_end_transaction.go
@@ -1109,15 +1109,16 @@ func changeReplicasTrigger(
 
 	var desc roachpb.RangeDescriptor
 	if change.Desc != nil {
+		// Trigger proposed by a 19.2+ node (and we're a 19.2+ node as well).
 		desc = *change.Desc
 	} else {
+		// Trigger proposed by a 19.1 node. Reconstruct descriptor from deprecated
+		// fields.
 		desc = *rec.Desc()
 		desc.SetReplicas(roachpb.MakeReplicaDescriptors(change.DeprecatedUpdatedReplicas))
 		desc.NextReplicaID = change.DeprecatedNextReplicaID
 	}
 
-	// TODO(tschottdorf): duplication of Desc with the trigger below, should
-	// likely remove it from the trigger.
 	pd.Replicated.State = &storagepb.ReplicaState{
 		Desc: &desc,
 	}
diff --git a/pkg/storage/replica_command.go b/pkg/storage/replica_command.go
index 49a0bb1e0862..b0ff7e189032 100644
--- a/pkg/storage/replica_command.go
+++ b/pkg/storage/replica_command.go
@@ -1266,9 +1266,12 @@ func (r *Replica) addReplicaLegacyPreemptiveSnapshot(
 	// complete. See #10409.
 	{
 		preemptiveRepDesc := roachpb.ReplicaDescriptor{
-			NodeID:    target.NodeID,
-			StoreID:   target.StoreID,
-			Type:      roachpb.ReplicaTypeVoterFull(),
+			NodeID:  target.NodeID,
+			StoreID: target.StoreID,
+			// NB: if we're still sending preemptive snapshot, the recipient is
+			// very likely a 19.1 node and does not understand this field. It
+			// won't matter to set it here, but don't anyway.
+			Type:      nil,
 			ReplicaID: 0, // intentional
 		}
 		if err := r.sendSnapshot(ctx, preemptiveRepDesc, SnapshotRequest_PREEMPTIVE, priority); err != nil {
@@ -1403,9 +1406,10 @@ func execChangeReplicasTxn(
 			deprecatedRepDesc = removed[0]
 		}
 		crt = &roachpb.ChangeReplicasTrigger{
-			DeprecatedChangeType: deprecatedChangeType,
-			DeprecatedReplica:    deprecatedRepDesc,
-			Desc:                 &updatedDesc,
+			DeprecatedChangeType:      deprecatedChangeType,
+			DeprecatedReplica:         deprecatedRepDesc,
+			DeprecatedUpdatedReplicas: updatedDesc.Replicas().All(),
+			DeprecatedNextReplicaID:   updatedDesc.NextReplicaID,
 		}
 	} else {
 		crt = &roachpb.ChangeReplicasTrigger{