Data Sync - Restart with downloaded data

I’m in the middle of moving over to an EmonPi for local logging. All is working fine and I have managed to get the Pi to sync with the data. However, there appears to be some gaps in the data, probably due to issues with the local logging - currently all devices log to both emonpi &, is there a way I can force the sync to start again and download all data up to the last value and not just the catchup data? I’d rather not have to re-create all the local feeds if possible, just force a full re-sync?