While trying to modify How can I compare string inside a tuple that is in a list suggestion to fit my purpose with the following:

m = {'User1': [('First', 5),
          ('Second', 4),
          ('Fourth', 4),
          ('Fourth', 5),
          ('Second', 5)],
    'User2': [('Third', 3),
          ('Third', 2),
          ('Second', 1),
          ('First', 1),
          ('First', 3)]}
          
# for key, val in m.items():
   # print(type(val))
      
result = {}
for key, val in m.items():
   for place, points in val:
       result.setdefault(place, []).append(points)
   result = [(place, points) for place, points in result.items()]
print(result)

which works fine on the first dictionary key, but when the loop goes to the
next key I get a
AttributeError: 'list' object has no attribute 'setdefault'

without the m dictionary key being in the final result. What am I missing that is
causing the key to not be generated with the resulting dictionary? The expected output
should be:

m = {'User1': [
         ('First', [5]),
         ('Second', [4, 5]),
         ('Fourth', [4, 5])
         ],
     'User2': [
         ('Third', [3, 2]),
         ('Second', [1]),
         ('First', [1, 3])
         ]
    }