AttributeError: 'AoT' object has no attribute 'multiline'

[vvanglro]

• 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.

Traceback (most recent call last):
  File "/opt/homebrew/bin/pdm", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/core.py", line 289, in main
    return Core().main(args)
           ^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/core.py", line 207, in main
    raise cast(Exception, err).with_traceback(traceback) from None
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/core.py", line 202, in main
    self.handle(project, options)
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/core.py", line 157, in handle
    command.handle(project, options)
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/cli/commands/import_cmd.py", line 35, in handle
    self.do_import(project, options.filename, options.format, options)
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/cli/commands/import_cmd.py", line 85, in do_import
    merge_dictionary(pyproject["tool"]["pdm"], settings)
  File "/opt/homebrew/Cellar/pdm/2.7.2/libexec/lib/python3.11/site-packages/pdm/cli/utils.py", line 616, in merge_dictionary
    target[key].multiline(True)  # type: ignore[attr-defined]
    ^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'AoT' object has no attribute 'multiline'

Steps to reproduce

pdm import pyproject.toml -v -f poetry

Actual behavior

Expected behavior

Environment Information

PDM version:
  2.7.2
Python Interpreter:
  /Users/hulk/miniforge3/envs/testpy38/bin/python (3.8)
Project Root:
  /Users/hulk/code/py/test
Local Packages:
  

# Paste the output of `pdm info && pdm info --env` below: