Hi,
Same situation happened to me with a CPF from dealer, I didn't found solution, and that normalization, on personal pack, destroy me a very large amount of work (21 styles)
Luckily I kept the original work out of the pack and I start to fix again the pack.
I didn't tried to erase YEM completely(and the history from user) and install again everything (N27 also) but I will do, searching for the solution.
I blind solution is to load and save on YEM all packs that you have every month to don't become too old.
I consider this just another usual Yamaha reason to joy.
If you work one year to finish a pack, why to don loose everything next year, with the new version of YEM or who knows why.
Happy as well!
Mihai