I recently upgraded to a Lumia 950 on windows 10 (previously had a Nokia 930 on windows 8.1). I noticed my backed up text messages were duplicated and sometimes tripled on my new phone which causes the messaging app to run very very slowly. I have the messages backed up locally on my PC but restoring from this using contacts+message backup seems to just add more copies of the messages.
I have attempted to delete the messages in the messaging app but this causes the app to crash and not open until I perform a factory reset. This then triggers the phone to download all the backed up messages again. So I am stuck in a loop.
Is there a way to delete the online sms backup so I can use the local backup. Or can I force the online backup to take the image of the sms on my old phone so they download correctly?