davdroid_sync_task

SYNCHRONIZATION INFO
Synchronization phase: 9
Account name: xxx@hotmail.fr
Authority: org.dmfs.tasks

STACK TRACE:
java.lang.IllegalArgumentException: DUE must not be < DTSTART
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:167)
at android.database.DatabaseUtils.readExceptionWithOperationApplicationExceptionFromParcel(DatabaseUtils.java:160)
at android.content.ContentProviderProxy.applyBatch(ContentProviderNative.java:519)
at android.content.ContentProviderClient.applyBatch(ContentProviderClient.java:377)
at at.bitfire.ical4android.BatchOperation.commit(BatchOperation.java:50)
at at.bitfire.ical4android.AndroidTask.add(AndroidTask.java:228)
at at.bitfire.davdroid.syncadapter.TasksSyncManager.processVTodo(TasksSyncManager.java:213)
at at.bitfire.davdroid.syncadapter.TasksSyncManager.downloadRemote(TasksSyncManager.java:179)
at at.bitfire.davdroid.syncadapter.SyncManager.performSync(SyncManager.java:182)
at at.bitfire.davdroid.syncadapter.TasksSyncAdapterService$SyncAdapter.onPerformSync(TasksSyncAdapterService.java:63)
at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:259)

SOFTWARE INFORMATION
DAVdroid version: 0.9.1.2 (86) Wed Jan 06 19:59:01 GMT+01:00 2016
Installed from: org.fdroid.fdroid
JB Workaround installed: no

CONFIGURATION
System-wide synchronization: automatically
Account: xxx@hotmail.fr
Address book sync. interval: 120 min
Calendar sync. interval: 120 min
OpenTasks sync. interval: 120 min

SYSTEM INFORMATION
Android version: 5.0 (LRX21V.N9005XXUGBOK6)
Device: Samsung SM-N9005 (hlte)