subramanian.esakkimuthu 40485 (6/14/2016)
in order to restore the database which is already exits you need to check the mdf ,ldf and ndf (if any) check where is is storing and check the file name should not be same as the old file other wise you will have an issue the file is exist
And you have to use the WITH MOVE option on the restore or it's going to attempt to overwrite the original files.
Again, practice, practice, practice this far away from your production server.