diff --git a/LeStorage/StoredCollection+Sync.swift b/LeStorage/StoredCollection+Sync.swift
index eee6d7f..70274c8 100644
--- a/LeStorage/StoredCollection+Sync.swift
+++ b/LeStorage/StoredCollection+Sync.swift
@@ -59,6 +59,11 @@ extension StoredCollection: SomeSyncedCollection where T : SyncedStorable {
     /// to an object when it's inserted. The StoredCollection possibly needs to update its own copy with new values.
     /// - serverInstance: the instance of the object on the server
     func updateFromServerInstance(_ serverInstance: T) {
+        
+        guard T.copyServerResponse else {
+            return
+        }
+        
         DispatchQueue.main.async {
             if let localInstance = self.findById(serverInstance.id) {
                 localInstance.copy(from: serverInstance)
@@ -104,7 +109,7 @@ extension StoredCollection: SomeSyncedCollection where T : SyncedStorable {
 
     /// Adds or update an instance and writes
     public func addOrUpdate(instance: T) {
-        Logger.log("\(T.resourceName()) : one item")
+//        Logger.log("\(T.resourceName()) : one item")
         defer {
             self.setChanged()
         }
@@ -121,7 +126,7 @@ extension StoredCollection: SomeSyncedCollection where T : SyncedStorable {
     
     /// Adds or update a sequence and writes
     public func addOrUpdate(contentOfs sequence: any Sequence<T>) {
-        Logger.log("\(T.resourceName()) : \(sequence.underestimatedCount) items")
+//        Logger.log("\(T.resourceName()) : \(sequence.underestimatedCount) items")
         defer {
             self.setChanged()
         }
diff --git a/LeStorage/StoredCollection.swift b/LeStorage/StoredCollection.swift
index 1376ec9..3ca056e 100644
--- a/LeStorage/StoredCollection.swift
+++ b/LeStorage/StoredCollection.swift
@@ -257,7 +257,12 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
 
     /// Updates an instance to the collection by index
     func updateItem(_ instance: T, index: Int) {
-        self.items[index].copy(from: instance)
+
+        let item = self.items[index]
+        if item !== instance {
+            self.items[index].copy(from: instance)
+        }
+
         instance.store = self.store
         self._indexes?[instance.id] = instance
     }