`omf update` doesn't seem to work correctly

[jney]

omf update gives a strange message while updating, as if was trying to install again

➜  plugin-peco git:(master) omf update
Updating Oh My Fish...
Oh My Fish is up to date.
Updating robbyrussell theme...
✔ robbyrussell theme up to date.
Error: plugin-balias package already installed.
Error: plugin-bundler package already installed.
Error: plugin-emacs package already installed.
Error: plugin-export package already installed.
Error: plugin-extract package already installed.
Error: plugin-foreign-env package already installed.
Error: plugin-git-flow package already installed.
Error: plugin-localhost package already installed.
Error: plugin-node package already installed.
Error: plugin-peco package already installed.
Error: plugin-rbenv package already installed.
Error: plugin-replace package already installed.
Error: plugin-ssh package already installed.
Error: plugin-tmux package already installed.

[ghost]

Assuming this is not related to the current problems we are presenting with the transition to the new architecture, this seems like you already have those plugins installed inside your $OMF_PATH or $fish_path.

[bpinto]

This is related to this: https://github.com/fish-shell/oh-my-fish/issues/535