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IDProjectCategoryView StatusLast Update
0013230Tine 2.0CalDAVpublic2017-06-27 10:32
ReportershochdoerferAssigned To 
Status newResolutionopen 
Product Version2017.02.3 Community Edition 
Target VersionFixed in Version 
Summary0013230: CalDAV Sync on Android generates duplicate events
DescriptionFor a long time I am using CalDAV-Sync to sync Tine 2.0 events to my Android phone. Since a few weeks reoccuring events get duplicated on Android during the sync. Like one appointment appears multiple times for one day on Android. There is one appointment that got duplicated like 12 times.

I recently upgraded to latest Android 6 version for my phone (PLK-L01C432B390). Are you aware of any similar issues?
TagsNo tags attached.




2017-06-18 09:40

developer   ~0020346

Similar issues are only known to me when using the SyncToken feature in Tine20. Never worked for me, hence this can be switched off in

Only other thing I'd try is to delete the caldav collection completely and set it up new and see what happens.


2017-06-24 09:56

reporter   ~0020408

It looked good for a while after I disabled the SyncToken feature but got worse again after a week or so. I am back at the multiple cloned events on my Android device.


2017-06-24 12:14

developer   ~0020410

I trust you deleted and recreated the caldav account on your phone after you disabled the SyncToken support?
If so then that's weird because I have been using it for years without a hitch on my S5 through Android 4.4 to 7.1. I use CalDAVSync too. Any hints for errors in logs? Did you try to enable debug log and see whether there are any hints?


2017-06-27 10:32

reporter   ~0020420

I deleted and created the caldav accounts multiple times on my Android device, even after disabling SyncToken support. Have not had a look at the looks, need to figure out how to filter them best ;)

Wired enough the sync works fine for me in Thunderbird/Lightning but also screws up for one of my co-workers with Thunderbird/Lightning.

Issue History

Date Modified Username Field Change
2017-06-17 12:36 shochdoerfer New Issue
2017-06-18 09:40 ingoratsdorf Note Added: 0020346
2017-06-24 09:56 shochdoerfer Note Added: 0020408
2017-06-24 12:14 ingoratsdorf Note Added: 0020410
2017-06-27 10:32 shochdoerfer Note Added: 0020420