diff --git a/app/Filament/Resources/InvoiceValidationResource.php b/app/Filament/Resources/InvoiceValidationResource.php
index b20fab4..fb02a38 100644
--- a/app/Filament/Resources/InvoiceValidationResource.php
+++ b/app/Filament/Resources/InvoiceValidationResource.php
@@ -385,6 +385,11 @@ class InvoiceValidationResource extends Resource
                             ->afterStateUpdated(function ($state, callable $set, callable $get) {
                                 $set('invoice_serial_number', null);
                                 $plantId = $get('plant_id');
+                                if (! $plantId) {
+                                    $set('invoice_serial_number', null);
+
+                                    return;
+                                }
                                 $plantCode = Plant::find($plantId)?->code ?? null;
 
                                 $directory = "uploads/temp/{$plantCode}";
@@ -399,7 +404,7 @@ class InvoiceValidationResource extends Resource
                             ->required()
                             ->acceptedFileTypes([
                                 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
-                                'application/vnd.ms-excel', // Legacy .xls fallback if needed
+                                // 'application/vnd.ms-excel', // Legacy .xls fallback if needed
                             ])
                             ->rules(['mimes:xlsx']) // Laravel validation: extension check
                             ->preserveFilenames() // <- this keeps the original filename
@@ -729,6 +734,11 @@ class InvoiceValidationResource extends Resource
                             ->afterStateUpdated(function ($state, callable $set, callable $get) {
                                 $set('invoice_material', null);
                                 $plantId = $get('plant_id');
+                                if (! $plantId) {
+                                    $set('invoice_material', null);
+
+                                    return;
+                                }
                                 $plantCode = Plant::find($plantId)?->code ?? null;
 
                                 $directory = "uploads/temp/{$plantCode}";
@@ -743,7 +753,7 @@ class InvoiceValidationResource extends Resource
                             ->required()
                             ->acceptedFileTypes([
                                 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
-                                'application/vnd.ms-excel', // Legacy .xls fallback if needed
+                                // 'application/vnd.ms-excel', // Legacy .xls fallback if needed
                             ])
                             ->rules(['mimes:xlsx']) // Laravel validation: extension check
                             ->preserveFilenames() // <- this keeps the original filename