How to deprecate a python package?

I don't know the exact procedure to do "deprecate a python package" and I couldn't find any in the docs.
I am from Manim's team, we previously published under the name of manimce and later changed to manim, because we didn't have access to manim name on PyPi initially (https://github.com/pypa/pypi-support/issues/450).

Now, we have done many releases on manim but left manimce just as is. I am wondering whether I should delete it(can it create problems?) or publish a new version that explicitly fails on install and point to the new package. Or simply leave it as it is now. I would also like to know what other packages do in this case?

I don't know the exact guidelines on how to, and I would like it to be in part of https://packaging.python.org.

まず、packaging.python.org にある既存のガイダンスと、リンクされている PyPI プロジェクトおよびサポート issue を確認します。放棄されたパッケージまたは名前変更されたパッケージについて文書化されている選択肢を比較し、推奨される手順とリスクを扱うガイダンスを追加します。maintainer がこの issue に頼らずに新しいドキュメントに従えるようになれば、作業は完了です。