Sync with only one Android causes database errors

[steve.w]

The situation:
NAS with Baikal 0.4.6 with 3 calendars running.
Syncing with two different Thunderbird works fine.
Syncing with Davdoid on Android-Tablet works fine.
Syncing with Davdroid on smartphone of my wife works fine.

Syncing 2 of the 3 calendars on my smartphone works fine…
but the 3rd calendar (for my job) doesn’t work correct.

Since a few day i get always get en database error while syncing the calendar “swo”.
I am syncing this calendar with Outlook (on the job), with Thunderbird and with the Android-Tablet without problems.

Only on my old (Samsung S3 mini with cynogenmod) and on my new Smartphone (Moto G3 wit Android 6) i get this error.
Although all events are displayed as it seems, but i am not sure.
Anyway i am not sure wether all events are synced complete.

I have already tried to clean the database of all entries and imported from ics-files on the Moto G3. Still the same error on syncing.
Any hint 4 me ?

Debug
Info

[rfc2822]

There seem to be problems with the exceptions of the recurring event /html/dav.php/calendars/steve/swo/8175b277-a5f0-4c4b-95aa-636632459a1b.ics. Can you please post it or send to play@bitfire.at (PGP)?

Does sychronizing other events work on those devices?

[steve.w]

Yes, as it seems all other other events will be synced…

Unfortunately all events have another uri (the long string at the end) in my database since i have cleaned this calendar and build it up again from an complete ics-file.

So the event you are asking for has an new uri.
I have to repeat the log-file to find out the new uri causing the problem.
How do i recognise the event causing problems in the log-file ?

[rfc2822]

The last “Adding to local calendar” entry before the error message:

2016-09-03 01:17:18 1 [syncadapter.CalendarSyncManager] Adding 8175b277-a5f0-4c4b-95aa-636632459a1b.ics to local calendar
[ … ]
2016-09-03 01:17:18 1 [ical4android.BatchOperation] Committing 91 operations …
2016-09-03 01:17:18 1 [ical4android.BatchOperation] Running operations 0 to 90
2016-09-03 01:17:19 1 [syncadapter.SyncManager] Couldn't access local storage
EXCEPTION at.bitfire.ical4android.CalendarStorageException: Batch operation failed partially (only 0 of 91 operations done)
        at at.bitfire.ical4android.BatchOperation.runBatch(BatchOperation.java:90)
        at at.bitfire.ical4android.BatchOperation.commit(BatchOperation.java:58)
        at at.bitfire.ical4android.AndroidEvent.add(AndroidEvent.java:357)
        at at.bitfire.davdroid.syncadapter.CalendarSyncManager.processVEvent(CalendarSyncManager.java:228)
        at at.bitfire.davdroid.syncadapter.CalendarSyncManager.downloadRemote(CalendarSyncManager.java:194)
        at at.bitfire.davdroid.syncadapter.SyncManager.performSync(SyncManager.java:170)
        at at.bitfire.davdroid.syncadapter.CalendarsSyncAdapterService$SyncAdapter.sync(CalendarsSyncAdapterService.java:67)
        at at.bitfire.davdroid.syncadapter.SyncAdapterService$SyncAdapter.onPerformSync(SyncAdapterService.java:87)
        at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:272)

[steve.w]

Thanx a lot. Found the suspicious event in my database deleted it and recreated it manually.
Now it works again