After many trys and changes i can start the wallet and the wallet synch, when i will load a full backup (2020), i get a syntax error from time to time.
It's better to start the wallet and let the wallet synch 100% and then i trys to restore the backup?
You don't need to sync anything. If you are going to restore from backup, select "light" when starting the wallet for the first time, then immediately proceed to restoring.