prepare(" SELECT id, calendar_event_id FROM termine WHERE status = 3 AND calendar_event_id IS NOT NULL AND calendar_event_id != '' "); $stmt->execute(); while ($termin = $stmt->fetch(PDO::FETCH_ASSOC)) { // Kalendereintrag löschen $Data->deleteCalendarEvent($termin['id']); // Optional: calendar_event_id zurücksetzen $update = $pdo->prepare(" UPDATE termine SET calendar_event_id = NULL WHERE id = ? "); $update->execute([$termin['id']]); } ?>