In jaraco/keyring#486, the reporter encountered an issue when keyring 22 changed the name of an entry point. After the change, with the latest version installed with --user and an older version installed in system site-packages, there are two copies of keyring installed, the latest version taking precedence. importlib_metadata, however, loads metadata for both packages, including references to the unreachable and no longer valid entry points from the older package.

Probably the entry_points loading mechanism should only return entry points for the first package by any given name.