Managing the properties of a hierarchy
Caution: 
Changing the source tables (elements table
				and relations table) can affect the subset or attribute definitions, or both. Some
				manual adjustments can be required. Changing the source table can cause a data loss
				or lead to unexpected results after publishing. Those issues can occur if the source
				table lacks the elements that were previously used or if the relations table
				contains elements that are not present in the elements table. Before you publish any
				changes, ensure that you have a backup copy of your data. If you are not sure about
				the consequences of changing the source table, consult your administrator or contact
				the support team. If you disable the relations table, you can lose your data. This
				can happen if the relations table contains elements that are not present in the
				elements table.
			Note: If a dimension has multiple hierarchies and multiple
				elements tables have a source column for the values of an attribute field, then the
				values are not automatically synched between those tables for base elements. Editing
				an attribute value in the elements editor of a hierarchy writes back only to the
				elements table on which the hierarchy is based. When you publish to OLAP, the attribute values from the elements table of the
				default hierarchy overwrite the values of the same element from other
				hierarchies.