custom page throws error when adding trait InteractsWithRecord

php artisan make:filament-page RescheduleCourse --resource=CourseResource --type=custom

   use InteractsWithRecord;

Declaration of Filament\Actions\Concerns\InteractsWithRecord::getModel(): ?string must be compatible with Filament\Resources\Pages\Page::getModel(): string

<?php

namespace App\Filament\Resources\CourseResource\Pages;

use App\Filament\Resources\CourseResource;
use Filament\Actions\Concerns\InteractsWithRecord;
use Filament\Resources\Pages\Page;

class RescheduleCourse extends Page
{
    use InteractsWithRecord;

    protected static string $resource = CourseResource::class;

    protected static string $view = 'filament.resources.course-resource.pages.reschedule-course';

    protected static ?string $title = 'Opleiding opnieuw inplannen';

    public function mount(int | string $record): void {
        $this->record = $this->resolveRecord($record);
    }
}