pdm export raises KeyError

[j1g5awi]

• I have searched the issue tracker and believe that this is not a duplicate.

Make sure you run commands with -v flag before pasting the output.

Steps to reproduce

1. clone nonepkg/plugin-all4one@0482129
2. pdm export -v

Actual behavior

The exported requirements file is no longer cross-platform. Using it on other platforms may cause unexpected result.
STATUS: Resolving packages from lockfile...
Traceback (most recent call last):
  File "/home/jigsaw/.local/bin/pdm", line 8, in <module>
    sys.exit(main())
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/core.py", line 295, in main
    return Core().main(args or sys.argv[1:])
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/core.py", line 208, in main
    raise cast(Exception, err).with_traceback(traceback) from None
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/core.py", line 203, in main
    self.handle(project, options)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/core.py", line 157, in handle
    command.handle(project, options)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/cli/commands/export.py", line 69, in handle
    candidates = resolve_candidates_from_lockfile(project, requirements.values())
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/cli/actions.py", line 142, in resolve_candidates_from_lockfile
    mapping, *_ = resolve(
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/resolver/core.py", line 36, in resolve
    result = resolver.resolve(requirements, max_rounds)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/resolvelib/resolvers.py", line 546, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/resolvelib/resolvers.py", line 426, in resolve
    name = min(unsatisfied_names, key=self._get_preference)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/resolvelib/resolvers.py", line 203, in _get_preference
    return self._p.get_preference(
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/resolver/providers.py", line 91, in get_preference
    deps = self.get_dependencies(candidate)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/resolver/providers.py", line 214, in get_dependencies
    deps, requires_python, _ = self.repository.get_dependencies(candidate)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/models/repositories.py", line 103, in get_dependencies
    requirements, requires_python, summary = getter(candidate)
  File "/home/jigsaw/.local/pipx/venvs/pdm/lib/python3.10/site-packages/pdm/models/repositories.py", line 555, in _get_dependencies_from_lockfile
    return self.candidate_info[self._identify_candidate(candidate)]
KeyError: ('pydantic[dotenv]', '1.10.11', None, False)

Expected behavior

no KeyError

Environment Information

PDM version:
  2.10.1
Python Interpreter:
  /home/jigsaw/Documents/Program/nonepkg/nonebot-plugin-all4one/.venv/bin/python (3.10)
Project Root:
  /home/jigsaw/Documents/Program/nonepkg/nonebot-plugin-all4one
Local Packages:

{
  "implementation_name": "cpython",
  "implementation_version": "3.10.12",
  "os_name": "posix",
  "platform_machine": "x86_64",
  "platform_release": "6.1.55",
  "platform_system": "Linux",
  "platform_version": "#1-NixOS SMP PREEMPT_DYNAMIC Sat Sep 23 09:11:13 UTC 2023",
  "python_full_version": "3.10.12",
  "platform_python_implementation": "CPython",
  "python_version": "3.10",
  "sys_platform": "linux"
}

related: #1786

[frostming]

See #2358