为什么我取消的活动无法编辑？即使单击删除约会，我也无法将其删除！（Outlook）

Question

我正在尝试取消通过Outlook中的日历创建的会议邀请，该会议实际上已取消，并且当我查看日历时，存在删除约会，当我单击它时，该约会未被删除！

下面是我的python代码！我想念什么？

Outlook版本：16.24

    ical = "BEGIN:VCALENDAR" + CRLF
    ical += "PRODID:pyICSParser" + CRLF
    ical += "VERSION:2.0" + CRLF
    ical += "CALSCALE:GREGORIAN" + CRLF
    ical += "X-WR-RELCALID:ABCD" + CRLF
    ical += "METHOD:CANCEL" + CRLF
    ical += "BEGIN:VEVENT" + CRLF
    ical += "DTSTART:" + dtstart + CRLF
    ical += "DTEND:" + dtend + CRLF
    ical += organizer + CRLF
    ical += "UID:123456AER" + CRLF
    ical += "SEQUENCE:2" + CRLF
    ical += "STATUS:CANCELLED" + CRLF
    ical += "TRANSP:OPAQUE" + CRLF
    ical += "END:VEVENT" + CRLF
    ical += "END:VCALENDAR" + CRLF

    part_cal = MIMEText(ical, 'calendar;method=CANCEL')