Problems link folder in cloud sync in new Mac

Hi, I have changed my mac, i recovered everything with time machine but i had to change the user and base folder name from 'mac' to 'paolo'. The sync service doesn't find the original folder as expected but, in Synchronization preferences, if i  try to change the sync folder i have an error message like "impossible to create folder in 'Users/paolo".

Can you help me in thi issue?

THANKS