app/Filament/Resources/WireMasterPackingResource/Pages/CreateWireMasterPacking.php

@@ -247,7 +247,14 @@ class CreateWireMasterPacking extends CreateRecord
             return;
         }
 
-        if((float)$weight > (float)$customerPoRecord->quantity)
+        $alreadyScannedQty = WireMasterPacking::where('customer_po_master_id', $customerPo)
+            ->where('plant_id', $plantId)
+            ->where('item_id', $itemId)
+            ->sum('weight');
+
+        $totalQty = (float)$alreadyScannedQty + (float)$weight;
+
+        if($totalQty > (float)$customerPoRecord->quantity)
         {
             Notification::make()
                 ->title("Scanned Weight Exceeds PO Quantity")