TrueNAS 12RC1 Jails & Plugins Update Error

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I am running the TN 12.0RC1. When I try to update my jails/plugins (plex) I get the following error, "Error: Major ABI change detected, please run 'upgrade' instead." I saw somewhere that I should try a "pkg upgrade -f" from the shell instead but that also error out.

Any idea on how to upgrade the plugins/jails?

Thanks!