diff --git a/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs b/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs
index 03235a8..da56bf3 100644
--- a/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs
+++ b/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs
@@ -16,7 +16,7 @@ namespace AyCode.Services.Server.SignalRs
     //public class TrackingItemInt<TDataItem>(TrackingState trackingState, TDataItem currentValue, TDataItem? originalValue = null) : TrackingItem<TDataItem, int>(trackingState, currentValue, originalValue) 
     //    where TDataItem : class, IId<int> {}
 
-    public abstract class TrackingItem<TDataItem, TId>(TrackingState trackingState, TDataItem currentValue, TDataItem? originalValue = null) where TDataItem : class, IId<TId> where TId : struct
+    public class TrackingItem<TDataItem, TId>(TrackingState trackingState, TDataItem currentValue, TDataItem? originalValue = null) where TDataItem : class, IId<TId> where TId : struct
     {
         public TrackingState TrackingState { get; internal set; } = trackingState;
         public TDataItem CurrentValue { get; internal set; } = currentValue;
@@ -68,7 +68,7 @@ namespace AyCode.Services.Server.SignalRs
         //protected abstract int FindIndex(TDataItem newValue);
         //public abstract bool TryGetTrackingItem(TId id, [NotNullWhen(true)] out TrackingItem<TDataItem, TId>? trackingItem);
 
-        private bool HasIdValue(TDataItem dataItem) => _equalityComparer.Equals(dataItem.Id, default);//dataItem.Id.IsNullOrEmpty();
+        private bool HasIdValue(TDataItem dataItem) => !_equalityComparer.Equals(dataItem.Id, default);//dataItem.Id.IsNullOrEmpty();
         public int FindIndex(TDataItem newValue) => _trackingItems.FindIndex(x => _equalityComparer.Equals(x.CurrentValue.Id, newValue.Id));
         public bool TryGetTrackingItem(TId id, [NotNullWhen(true)] out TrackingItem<TDataItem, TId>? trackingItem)
         {
@@ -100,7 +100,7 @@ namespace AyCode.Services.Server.SignalRs
                 originalValue = TrackingItemHelpers.JsonClone(originalValue);
 
             //trackingItem = new TrackingItem<TDataItem>(trackingState, newValue, originalValue);
-            trackingItem = (TrackingItem<TDataItem, TId>)Activator.CreateInstance(typeof(TrackingItem<TDataItem, TId>), trackingState, newValue, originalValue)!;
+            trackingItem = new TrackingItem<TDataItem, TId>(trackingState, newValue, originalValue);
             _trackingItems.Add(trackingItem);
 
             return trackingItem;
@@ -168,7 +168,7 @@ namespace AyCode.Services.Server.SignalRs
         private readonly EqualityComparer<TId> _equalityComparer = EqualityComparer<TId>.Default;
 
         protected TIList InnerList = Activator.CreateInstance<TIList>();// []; //TODO: Dictionary??? - J.
-        protected readonly ChangeTracking<TDataItem, TId> TrackingItems = Activator.CreateInstance<ChangeTracking<TDataItem, TId>>();
+        protected readonly ChangeTracking<TDataItem, TId> TrackingItems = new();
 
         public object[]? ContextIds;
         public string? FilterText { get; set; }
@@ -184,7 +184,7 @@ namespace AyCode.Services.Server.SignalRs
         //protected abstract int FindIndexInnerList(TId id);
         //protected abstract TDataItem? FirstOrDefaultInnerList(TId id);
 
-        protected bool HasIdValue(TDataItem dataItem) => _equalityComparer.Equals(dataItem.Id, default);//dataItem.Id.IsNullOrEmpty();
+        protected bool HasIdValue(TDataItem dataItem) => !_equalityComparer.Equals(dataItem.Id, default);//dataItem.Id.IsNullOrEmpty();
         protected bool IdEquals(TId id1, TId id2) => _equalityComparer.Equals(id1, id2);
         protected int FindIndexInnerList(TId id) => InnerList.FindIndex(x => IdEquals(x.Id, id));
         protected TDataItem? FirstOrDefaultInnerList(TId id) => InnerList.FirstOrDefault(x => IdEquals(x.Id, id));
@@ -290,7 +290,12 @@ namespace AyCode.Services.Server.SignalRs
                 }
                 else if (clearChangeTracking) TrackingItems.Clear();
 
-                if (refreshDataFromDbAsync) LoadDataSourceAsync(false).Forget();
+                //TODO: Átgondolni, OnDataSourceLoaded meghívódik mielőtt az adatok betöltődnének a .Forget() miatt! - J.
+                if (refreshDataFromDbAsync)
+                {
+                    LoadDataSourceAsync(false).Forget();
+                    return;
+                }
             }
             finally
             {