How to restrict unpublish of a certain package version with verdaccio?

Question

I want to restrict the unpublishing of a package with a certain version number with Verdaccio.

I am aware of the feature called Package Access.

I tried:

 '@scope/myPackage@1.0.0':
    access: $all
    publish: $authenticated
    unpublish:

this does not work.

Is there any other possibility to restrict the unpublishing of a certain version of a package published in verdaccio?