app/Filament/Resources/PanelBoxValidationResource/Pages/CreatePanelBoxValidation.php

@@ -97,7 +97,7 @@ class CreatePanelBoxValidation extends CreateRecord {
         }
 
         $this->existingRecords = ProductCharacteristicsMaster::where('plant_id', $plantId)
-            ->where('category', $categoryName)
+            ->where('item_id', $item->id)
             ->where('line_id', $lineId)
             ->orderBy('id', 'asc')
             ->get();