pdm deletes pyproject.toml keys it's not authorized to

[sigma67]

• [x ] 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

Create a project using for example setuptools-scm, which requires you to add the following empty section

[tool.setuptools_scm]

but also works with other empty sections like [project.optional-dependencies].

Then run any pdm command that writes to pyproject.toml (pdm add xx, pdm remove xx).

Actual behavior

The empty section key will be removed.

Expected behavior

pdm should not remove keys that don't concern the command

Environment Information

latest pdm 2.12.4

[sigma67]

Thanks for the quick fix!