I don't know, I just left it importing and did another work, gone back around 2 hours and it was ok. So no more than 2 hours
Thanks it worked like a charm.
For some reason now that it's sync'd I am short +-1100 CINNI.
Try restarting the wallet. One of my wallets yesterday shows it has 99k coins after stake but there was only 89k. After restarting it a few times it self corrected.