pkgin oddity

[Mike Pumford <mpumford%mudcovered.org.uk@localhost>]

Can anyone explain this:

pkgin install emacs28
calculating dependencies...done.

1 package to install:
  emacs28-28.2

0 to refresh, 0 to upgrade, 1 to install
0B to download, 111M to install

proceed ? [Y/n]
installing emacs28-28.2...
emacs28-28.2: /var/games/emacs/snake-scores already exists
emacs28-28.2: /var/games/emacs/tetris-scores already exists
pkg_install warnings: 0, errors: 0
reading local summary...
processing local summary...
marking emacs28-28.2 as non auto-removable
bash-5.1# pkgin autoremove
1 packages to be autoremoved:
  emacs28-28.2

proceed ? [Y/n] n

Why is autoremove offering removal of emacs28 a package its marked as 
not autoremovable?

Attempting to manually mark it as a keep package also fails.

Mike