Are you Syncing to Mobile/Web?Do you use the Mobile app on your smartphone or the
Quicken on the Web feature?
If no, turn Sync off
completely. You don't need it.
If yes, try to Reset
Sync so that the current cloud sync file is replaced with a fresh complete copy
Do note that a full Sync process may take many minutes to complete.
Log out of your
mobile app, then do this on your desktop / laptop:
How to reset Sync to Cloud
How to turn off Sync to Cloud for the current data