Issue with Generating a second Rigify Meta Rigs- Thanks in Advance

After successfully rigging one character with the Rigify tool, Added a second Meta-rig that doesn’t generate saying’can’t add new bone root outside of edit mode{}incorrect armature type utils.
I ended up clearing all the rigs and starting again but even when i back tracked to my first rig, it wasn’t generating a second rig.
I would really appreciate a clear and helpful response.