Select downtime cause(s) by activating the checkbox at the beginning of the relevant row(s).
Click .
The Delete downtime causes? dialog opens.
The following cases are possible:
The selected downtime cause(s) is/are deleted. Already used downtime causes, including their children, are retained and hidden.
The selected downtime cause or at least one of the selected downtime causes is part of a hierarchy and cannot be deleted individually. Already used downtime causes, including their children, are retained and hidden.