There was an issue with the “old” template as it came without a specific <index_order>. In this case, the hrStorageIndex was used as the index. For existing filesystems, this will unfortunately change in case a new filesystem is added or removed. This way, the old template cuased issues on re-indexing. Now, you may add <index_order>hrStorageDescr:hrStorageIndex</index_order> to the XML file manual