my @Logwerte = (
  {
    Name => "Name1",
    GAs => {
             GA => "GA1",
             columnName => "A"
           }
  },
  {
    Name => "Name2",
   GAs => 
          {
            GA => "GA2",
            columnName => "A"
          },
   'HASH(0815)' => undef
  },
);