Caldav calendar duplicates on sync

I had the same problem on my jolla 1, but the duplicates disappeared after a reboot.

Same problem here, but the duplicates don't disappear on reboot! I'm using ownCloud 9.1.0

The duplicates reappeared on my device, after they were gone after a reboot. I'm using the caldav server from mailbox.org, which is using Open-Xchange.

The only thing that works for me is to delete the caldav/carddav account and recreate it. I now do this around once a week, depending on how annoying it gets to disable the double calendars. But it would better if Jolla would look into this and fix it.

I have this problem on my Jolla 1, running 2.0.2.51 Aurajoki, syncing with fruux. At least I know now what the trigger may be: a new event, made on the phone. A reboot does not help. Jolla should fix this indeed.

At least the trigger is NOT a new event, made on the phone. Although I was tempted now and then to add a new event, I didn't. But suddenly the fruux calendars had tripled. I had to delete my fruux account again and reinstall it.

I still have it sometimes. I can't see a pattern in what is happening. I have made new entries on the phone, in owncloud and on my desktop, but I have not had a duplication for a while. Still no clue on what triggers it...

I have this on my Intex Aqua Fish with Sailfish 2.0.2.51. Currently I have 3 instances of the same calendar. To prevent from triple notifications I have disabled 2 instances. To do so, start calendar, swipe down to open de pulley menu and select manage calendars. There you can disable all but one instance. This is a workaround but of course the cause of this issue should be fixed asap.

I use the following post to resolve my problem: https://together.jolla.com/question/59173/delete-all-entries-from-a-calendar/ In combination of Notepad++ column edit mode and search&replace it is quiet eays to delete the entries and the calendars in two steps (3 calendars, each 63 times).

I do remove the whole calendar db from time to time when it is out of hand. But the main issue still is: why do the calendars duplicate from time to time? There is no real pattern to as far as I can see. It is annoying.

I already posted this in another thread here on the same topic, after more than six months without any sign of jolla to fix this really annoying bug, I am soon ready to leave for lineage on a xiaomi. It's really sad about all the good work done so far. But it seems, jolla won't become what it was looking it will be.