changes done

app/Filament/Resources/Projektes/RelationManagers/ProjektObjekteImDetailRelationManager.php

@@ -145,9 +145,8 @@ class ProjektObjekteImDetailRelationManager extends RelationManager
             ])
             ->recordActions([
                 EditAction::make()->iconButton()
-                    ->mutateDataUsing(function ($data): array {
-
-                        $data['nutzwert'] = round($data['faktor'] * $data['flaeche']);
+                    ->mutateDataUsing(function ($data, $record): array {
+                        $data['nutzwert'] = round($record->methode->faktor * $data['flaeche']);
 
                         return $data;
                     })->after(function (Component $livewire) {