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.

Commencez par examiner la documentation existante sur packaging.python.org ainsi que les projets PyPI et l’issue de support associés. Comparez les options documentées pour un package abandonné ou renommé, puis ajoutez une documentation couvrant la procédure recommandée et les risques ; le travail est terminé lorsqu’un maintainer peut suivre la nouvelle documentation sans s’appuyer sur cette issue.