ok i just solved the problem no more need to search...found it in some
other launchpad bugs report...

just take care of the whole directory:

sudo rm /var/lib/apt/lists/* -vf

then try updating: sudo apt-get update

then try to use the update-manager

just restart your ubuntu and thats all;upgrade done.

** Changed in: update-manager (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/874425

Title:
  Bug when upgrading

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