Nextcloud version (eg, 20.0.5): 20.0.4
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
The issue you are facing:
I have an issue with the iOS (iPhone) calendar duplicating all events once they are updated.
So, calendar setup works fine and it syncs successfully. Then, another client updates an event, the update is correctly processed by Nextcloud and I see only ONE updated event in the web UI. But when the iPhone picks up the changes, it duplicates the event. There is one duplicate for each update the event received.
The external client is just issuing HTTP PUT on the event resource, e.g. with a payload like this:
BEGIN:VCALENDAR
PRODID:-//j-lawyer.org//iCal4j 1.0//EN
VERSION:2.0
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:Europe/Berlin
LAST-MODIFIED:20201011T015911Z
TZURL:http://tzurl.org/zoneinfo/Europe/Berlin
X-LIC-LOCATION:Europe/Berlin
X-PROLEPTIC-TZNAME:LMT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+005328
TZOFFSETTO:+0100
DTSTART:18930401T000000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
DTSTART:19160430T230000
RDATE:19400401T020000
RDATE:19430329T020000
RDATE:19460414T020000
RDATE:19470406T030000
RDATE:19480418T020000
RDATE:19490410T020000
RDATE:19800406T020000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19161001T010000
RDATE:19421102T030000
RDATE:19431004T030000
RDATE:19441002T030000
RDATE:19451118T030000
RDATE:19461007T030000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
DTSTART:19170416T020000
RRULE:FREQ=YEARLY;UNTIL=19180415T010000Z;BYMONTH=4;BYDAY=3MO
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19170917T030000
RRULE:FREQ=YEARLY;UNTIL=19180916T010000Z;BYMONTH=9;BYDAY=3MO
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
DTSTART:19440403T020000
RRULE:FREQ=YEARLY;UNTIL=19450402T010000Z;BYMONTH=4;BYDAY=1MO
END:DAYLIGHT
BEGIN:DAYLIGHT
TZNAME:CEMT
TZOFFSETFROM:+0200
TZOFFSETTO:+0300
DTSTART:19450524T020000
RDATE:19470511T030000
END:DAYLIGHT
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0300
TZOFFSETTO:+0200
DTSTART:19450924T030000
RDATE:19470629T030000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0100
TZOFFSETTO:+0100
DTSTART:19460101T000000
RDATE:19800101T000000
END:STANDARD
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19471005T030000
RRULE:FREQ=YEARLY;UNTIL=19491002T010000Z;BYMONTH=10;BYDAY=1SU
END:STANDARD
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19800928T030000
RRULE:FREQ=YEARLY;UNTIL=19950924T010000Z;BYMONTH=9;BYDAY=-1SU
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
DTSTART:19810329T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19961027T030000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20211014T213847Z
DTSTART;VALUE=DATE:20211004
SUMMARY:test 4.10.
LOCATION:
DESCRIPTION:blabla
UID:4312506e7f000101629eaf9c48334a9b
X-ALT-JLAWYERORG:1
END:VEVENT
END:VCALENDAR
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- create event in nextcloud
- sync to iphone
- update event (external client via CalDAV)
- sync to iphone
→ event duplicated
Under which circumstance would the iPhone CalDAV client duplicate the event?
Thanks,
Jens