diff --git a/params/version.go b/params/version.go
index 217aaa394362..bedb0d47e438 100644
--- a/params/version.go
+++ b/params/version.go
@@ -24,7 +24,7 @@ import (
 const (
 	VersionMajor = 5         // Major version component of the current release
 	VersionMinor = 1         // Minor version component of the current release
-	VersionPatch = 26        // Patch version component of the current release
+	VersionPatch = 27        // Patch version component of the current release
 	VersionMeta  = "mainnet" // Version metadata to append to the version string
 )
 
diff --git a/rollup/sync_service/sync_service.go b/rollup/sync_service/sync_service.go
index e8efd9a54e53..05f95c47abf6 100644
--- a/rollup/sync_service/sync_service.go
+++ b/rollup/sync_service/sync_service.go
@@ -220,7 +220,9 @@ func (s *SyncService) fetchMessages() {
 		}
 
 		for _, msg := range msgs {
-			queueIndex++
+			if msg.QueueIndex > 0 {
+				queueIndex++
+			}
 			// check if received queue index matches expected queue index
 			if msg.QueueIndex != queueIndex {
 				log.Error("Unexpected queue index in SyncService", "expected", queueIndex, "got", msg.QueueIndex, "msg", msg)