`ParseError` exception when handling TOML AoT

Hi!

I'm trying to parse a TOML document with tomlkit version 0.13.3 and getting this exception:
tomlkit.exceptions.ParseError: Key "fruits" already exists.

The document seems valid to me.

Code

import tomlkit


DOCUMENT = """
[[shops.aaa.fruits]]
id = "apple"

[[shops.bbb.fruits]]
id = "orange"

[[shops.aaa.fruits]]
id = "banana"
"""

parsed = tomlkit.parse(DOCUMENT)

print(tomlkit.dumps(parsed))

Expected

The document is parsed successfully.

Actual

Parsing fails with a ParseError.

Stacktrace

Traceback (most recent call last):
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/parser.py", line 161, in parse
    body.append(key, value)
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/container.py", line 252, in append
    current.append(k, v)
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/items.py", line 1632, in append
    _item = self._value[key]
            ~~~~~~~~~~~^^^^^
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/container.py", line 652, in __getitem__
    item = self.item(key)
           ^^^^^^^^^^^^^^
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/container.py", line 476, in item
    return OutOfOrderTableProxy(self, idx)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/container.py", line 846, in __init__
    self._internal_container._raw_append(k, v)
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/container.py", line 319, in _raw_append
    raise KeyAlreadyPresent(key)
tomlkit.exceptions.KeyAlreadyPresent: Key "fruits" already exists.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/wfzx/dev/py/toml/main.py", line 15, in <module>
    parsed = tomlkit.parse(DOCUMENT)
             ^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/api.py", line 93, in parse
    return Parser(string).parse()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/wfzx/dev/py/toml/venv/lib/python3.12/site-packages/tomlkit/parser.py", line 163, in parse
    raise self.parse_error(ParseError, str(e)) from e
tomlkit.exceptions.ParseError: Key "fruits" already exists. at line 9 col 0

Reproduce the failure with the TOML document from the issue, then trace the parse flow through parser.py, container.py, and items.py using the supplied stack trace. The fix is complete when the document parses successfully and tomlkit.dumps(parsed) produces output without the ParseError.