diff --git a/swarm/network/protocol.go b/swarm/network/protocol.go
index 1b93401c9d..dd8a86c0b3 100644
--- a/swarm/network/protocol.go
+++ b/swarm/network/protocol.go
@@ -43,7 +43,7 @@ var DefaultTestNetworkID = rand.Uint64()
 // BzzSpec is the spec of the generic swarm handshake
 var BzzSpec = &protocols.Spec{
 	Name:       "bzz",
-	Version:    8,
+	Version:    9,
 	MaxMsgSize: 10 * 1024 * 1024,
 	Messages: []interface{}{
 		HandshakeMsg{},
diff --git a/swarm/network/protocol_test.go b/swarm/network/protocol_test.go
index 737ad0784f..616abde9ed 100644
--- a/swarm/network/protocol_test.go
+++ b/swarm/network/protocol_test.go
@@ -36,7 +36,7 @@ import (
 )
 
 const (
-	TestProtocolVersion = 8
+	TestProtocolVersion = 9
 )
 
 var TestProtocolNetworkID = DefaultTestNetworkID
diff --git a/swarm/network/stream/syncer.go b/swarm/network/stream/syncer.go
index 9bde39550b..7a61950eda 100644
--- a/swarm/network/stream/syncer.go
+++ b/swarm/network/stream/syncer.go
@@ -18,6 +18,7 @@ package stream
 
 import (
 	"context"
+	"fmt"
 	"strconv"
 	"time"
 
@@ -58,7 +59,7 @@ func RegisterSwarmSyncerServer(streamer *Registry, netStore *storage.NetStore) {
 		if err != nil {
 			return nil, err
 		}
-		return NewSwarmSyncerServer(po, netStore, p.ID().String()+"|"+string(po))
+		return NewSwarmSyncerServer(po, netStore, fmt.Sprintf("%s|%d", p.ID(), po))
 	})
 	// streamer.RegisterServerFunc(stream, func(p *Peer) (Server, error) {
 	// 	return NewOutgoingProvableSwarmSyncer(po, db)
@@ -146,16 +147,16 @@ func (s *SwarmSyncerServer) SetNextBatch(from, to uint64) ([]byte, uint64, uint6
 			if batchSize >= BatchSize {
 				iterate = false
 				metrics.GetOrRegisterCounter("syncer.set-next-batch.full-batch", nil).Inc(1)
-				log.Debug("syncer pull subscription - batch size reached", "correlateId", s.correlateId, "batchSize", batchSize, "batchStartID", batchStartID, "batchEndID", batchEndID)
+				log.Trace("syncer pull subscription - batch size reached", "correlateId", s.correlateId, "batchSize", batchSize, "batchStartID", batchStartID, "batchEndID", batchEndID)
 			}
 			if timer == nil {
 				timer = time.NewTimer(batchTimeout)
 			} else {
-				log.Debug("syncer pull subscription - stopping timer", "correlateId", s.correlateId)
+				log.Trace("syncer pull subscription - stopping timer", "correlateId", s.correlateId)
 				if !timer.Stop() {
 					<-timer.C
 				}
-				log.Debug("syncer pull subscription - channel drained, resetting timer", "correlateId", s.correlateId)
+				log.Trace("syncer pull subscription - channel drained, resetting timer", "correlateId", s.correlateId)
 				timer.Reset(batchTimeout)
 			}
 			timerC = timer.C
@@ -164,10 +165,10 @@ func (s *SwarmSyncerServer) SetNextBatch(from, to uint64) ([]byte, uint64, uint6
 			// received after some time
 			iterate = false
 			metrics.GetOrRegisterCounter("syncer.set-next-batch.timer-expire", nil).Inc(1)
-			log.Debug("syncer pull subscription timer expired", "correlateId", s.correlateId, "batchSize", batchSize, "batchStartID", batchStartID, "batchEndID", batchEndID)
+			log.Trace("syncer pull subscription timer expired", "correlateId", s.correlateId, "batchSize", batchSize, "batchStartID", batchStartID, "batchEndID", batchEndID)
 		case <-s.quit:
 			iterate = false
-			log.Debug("syncer pull subscription - quit received", "correlateId", s.correlateId, "batchSize", batchSize, "batchStartID", batchStartID, "batchEndID", batchEndID)
+			log.Trace("syncer pull subscription - quit received", "correlateId", s.correlateId, "batchSize", batchSize, "batchStartID", batchStartID, "batchEndID", batchEndID)
 		}
 	}
 	if batchStartID == nil {