繰り返しの日付範囲を編集しようとしています。以下の注意事項をよくお読みください。

By editing your primary recurrence set, you will change all subsequent default values of your other recurrences.

If you shorten the date range or limit your recurrence dates, any recurrences falling outside the new date range will be 以下の設定に従って削除またはキャンセル.

If you extend or add more dates, the new recurrences will be added to your recurrence set without affecting previously created ones.