Nothing to do with Inter. They sold that debt to a bank last summer because they needed the cash. Chelsea is paying the remaining fees to that bank.I suspect there is still money outstanding for him. I expect that they'll get him on loan and some of the monies owed on the transfer fee will be forgiven. How much that will be is anyones guess.
Inter is still in a complicated financial situation (around 100M losses). They can't afford to spend 50M+ on buying a 30-year-old player who will be taking such big wages.