added after state updated in wire master print page

app/Filament/Pages/WireMasterPrint.php

@@ -80,7 +80,10 @@ class WireMasterPrint extends Page
 
                                 return CustomerPoMaster::where('plant_id', $plantId)->distinct()->pluck('customer_po', 'customer_po'); //->pluck('customer_po', 'id'); ->distinct()
                             })
-                            ->required(),
+                            ->required()
+                            ->afterStateUpdated(function ($state, callable $set) {
+                                $set('scan_pallet_no', null);
+                            }),
                         Select::make('scan_pallet_no')
                             ->label('Scan Pallet No')
                             ->reactive()