Error with Multi stat installation

Which version of the Multistat panel works with version 6.7.0? I am trying to install michaeldmoore-multistat-panel in grafana version 6.7.0 and am getting the following error:
EROR[03-20|09:45:19] Plugins: Failed to load plugin json file: /opt/grafana-6.7.0/data/plugins/michaeldmoore-multistat-panel/dist/plugin.json, err: Plugin with ID “michaeldmoore-multistat-panel” already exists
WARN[03-20|09:45:19] Some plugins failed to load logger=plugins errors="[Plugin with ID “michaeldmoore-multistat-panel” already exists]"