diff --git a/app/Filament/Pages/PanelBoxInspectionStock.php b/app/Filament/Pages/PanelBoxInspectionStock.php
index f9354ee..eb9130f 100644
--- a/app/Filament/Pages/PanelBoxInspectionStock.php
+++ b/app/Filament/Pages/PanelBoxInspectionStock.php
@@ -428,12 +428,12 @@ class PanelBoxInspectionStock extends Page
             }
         }
 
-        $serialExists = PanelBoxValidation::where('serial_number', $serialNumber)->where('plant_id', $plantId)->first();
+        $serialExists = PanelBoxValidation::where('plant_id', $plantId)->where('serial_number', $serialNumber)->where('panel_box_supplier', $supplier)->first();
 
         if ($serialExists) {
             Notification::make()
                 ->title('Duplicate Serial Number')
-                ->body("Serial number already exists $serialNumber.")
+                ->body("Serial number already exists '$serialNumber' with supplier number '$supplier'.")
                 ->danger()
                 ->send();
             $this->form->fill([