diff --git a/backend/mttnet/syncing.go b/backend/mttnet/syncing.go
index bca1865e..8ff0945f 100644
--- a/backend/mttnet/syncing.go
+++ b/backend/mttnet/syncing.go
@@ -120,7 +120,7 @@ WHERE blobs.size >= 0 AND (res.iri LIKE `
 
 // QListEmbeddedBlobsStr gets embedded blobs related to multiple eids
 const QListEmbeddedBlobsStr = `
-SELECT
+SELECT DISTINCT
 blobs.codec,
 blobs.multihash,
 blobs.insert_time
diff --git a/backend/syncing/rbsr/storage.go b/backend/syncing/rbsr/storage.go
index 80b26cb2..e5e1bb78 100644
--- a/backend/syncing/rbsr/storage.go
+++ b/backend/syncing/rbsr/storage.go
@@ -38,7 +38,7 @@ func (v *sliceStore) Insert(createdAt int64, id []byte) error {
 	item := NewItem(createdAt, id)
 	for _, it := range v.items {
 		if it.Cmp(item) == 0 {
-			return errors.New("Item already exists")
+			return nil
 		}
 	}
 	v.items = append(v.items, item)