diff --git a/OrdersManagement/Components/Pages/Warehouse.razor b/OrdersManagement/Components/Pages/Warehouse.razor
index 9ed444e..eac9d5e 100644
--- a/OrdersManagement/Components/Pages/Warehouse.razor
+++ b/OrdersManagement/Components/Pages/Warehouse.razor
@@ -94,6 +94,17 @@
                 <DialogButton Content="OK" IsPrimary="true" OnClick="@HideModal"/>
             </DialogButtons>
         </SfDialog>
+
+        <SfDialog Width="500px" Title="Błąd" IsModal="true" @bind-Visible="VisibilityError" AllowPrerender="true">
+            <DialogTemplates>
+                <Content>
+                    <p>Błąd: Dla zaznaczonego rekordu istnieje już PackingList!</p>
+                </Content>
+            </DialogTemplates>
+            <DialogButtons>
+                <DialogButton Content="OK" IsPrimary="true" OnClick="@HideModal"/>
+            </DialogButtons>
+        </SfDialog>
         
         <CardFooter>
             <small class="text-muted">FA Krosno Manager © @(DateTime.Now.Year)</small>
@@ -115,6 +126,7 @@
     private bool _isVisible;
     
     private bool Visibility { get; set; }
+    private bool VisibilityError { get; set; }
 
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
@@ -178,12 +190,20 @@
             return;
         }
 
+        string wzNumbers = string.Join(", ",selectedRecords.Select(x => x.MTGroupNum).Distinct());
+
+        if (_wzHeaders.Any(x => x.WzNumbers == wzNumbers))
+        {
+            VisibilityError = true;
+            return;
+        }
+        
         WzHeaderDto wzHeader = new WzHeaderDto
         {
             ID = Guid.NewGuid(),
             FK_Client = _selectedClient?.ID,
             CreatedDate = DateTime.Now,
-            WzNumbers = string.Join(", ",selectedRecords.Select(x => x.MTGroupNum).Distinct())
+            WzNumbers = wzNumbers
         };
 
         await WarehouseService.CreateWzHeaderAsync(wzHeader);
@@ -223,5 +243,6 @@
     private void HideModal()
     {
         Visibility = false;
+        VisibilityError = false;
     }
 }
\ No newline at end of file
diff --git a/OrdersManagement/Components/Pages/WarehousePackList.razor b/OrdersManagement/Components/Pages/WarehousePackList.razor
index 9f6d14c..8e11b74 100644
--- a/OrdersManagement/Components/Pages/WarehousePackList.razor
+++ b/OrdersManagement/Components/Pages/WarehousePackList.razor
@@ -1,13 +1,16 @@
 @page "/Warehouse/PackList/{WzHeader:guid}"
 @using System.Diagnostics
 @using OrdersManagement.Models
+@using Syncfusion.Blazor
 @using Syncfusion.Blazor.Cards
+@using Syncfusion.Blazor.Data
 @using Syncfusion.Blazor.Grids
 @using SytelineSaAppEfDataModel.Dtos
 @using Syncfusion.Blazor.Navigations
 @using Syncfusion.Blazor.Popups
 @using Syncfusion.Blazor.Inputs
 @using Action = System.Action
+@using FilterType = Syncfusion.Blazor.Grids.FilterType
 
 @inject WarehouseService WarehouseService
 
@@ -65,7 +68,7 @@
                     <GridColumn Field=@nameof(WzRowMeyleDto.OrderNumber) AllowEditing="false"
                                 TextAlign="TextAlign.Center" HeaderText="Numer Zamówienia Meyle"
                                 Width="70"></GridColumn>
-                    <GridColumn Field=@nameof(WzRowMeyleDto.FaIndex) AllowEditing="false"
+                    <GridColumn Field=@nameof(WzRowMeyleDto.FaIndex) AllowEditing="false" AllowFiltering="true"
                                 TextAlign="TextAlign.Center" HeaderText="Numer Indeksu FA" Width="100"></GridColumn>
                     <GridColumn Field=@nameof(WzRowMeyleDto.ItemNumber) AllowEditing="false"
                                 TextAlign="TextAlign.Center" HeaderText="Numer Indeksu Meyle" Width="100"></GridColumn>
@@ -299,6 +302,9 @@
             return;
         }
 
+        _grid.Query = null;
+        _grid.ClearFilteringAsync();
+
         if (materialTransactionByPartNumber != null)
         {
             SelectedRows.Clear();
@@ -386,10 +392,10 @@
                         ChangedRecords.Add(record);
 
                         int index = WzRowsMeyle.IndexOf(record);
+                        
                         if (index >= 0)
                         {
                             selectedIndices.Add(index);
-                            Console.WriteLine($"Dodano indeks: {index}"); // Debugowanie
                         }
                     }
                 }
@@ -397,6 +403,10 @@
                 SelectedRows.Clear();
                 SelectedRows.AddRange(ChangedRecords);
 
+                SelectedRow = SelectedRows.FirstOrDefault();
+
+                await ApplyFilter(ChangedRecords);
+                
                 break;
             }
             default:
@@ -540,5 +550,9 @@
         Backtrack(0, 0);
         return result;
     }
-
+    
+    private async Task ApplyFilter(IList<WzRowMeyleDto> selectedRecords)
+    {
+        await _grid.FilterByColumnAsync(nameof(WzRowMeyleDto.FaIndex), "equal", selectedRecords.First().FaIndex);
+    }
 }
\ No newline at end of file