Aaargh, talked too soon.
It's not a big problem but it's pretty annoying: after I restored the SMS with Super Backup I got the notification on the Messages app that I have 163 new SMS (the number of restored SMS) and there's no way I can remove the notification.
I also disabled the app since I use Hangout but the notification is still there.
It only disappeared when I cleared data from settings, but if I open Messages the notification appear again, and also if (without opening the app) I restart the phone.
Of course reading the SMS won't change anything
What should I do?