app/Filament/Resources/ProductCharacteristicsMasterResource.php

@@ -269,7 +269,8 @@ class ProductCharacteristicsMasterResource extends Resource
                     ->label('Created By')
                     ->default(Filament::auth()->user()?->name),
                 Forms\Components\Hidden::make('updated_by')
-                    ->label('Updated By'),
+                    ->label('Updated By')
+                    ->default(Filament::auth()->user()?->name),
                 Forms\Components\TextInput::make('id')
                     ->hidden()
                     ->readOnly(),