Unable to change an attribute that has a fact usage to have no aggregate property.

Unable to change an attribute that has a fact usage to have no aggregate property. It is possible to change the regular aggregate, but you can't change the semi-aggregate.

This can be done by setting the attribute usage to unknown and then redetermining usage on the attribute In the Project Viewer pane, select one or more query subjects. In the Properties pane, change the following values - the Usage property to unknown. the Regular Aggregate property to unsupported From the Actions menu, click Determine Usage to leave the aggregate properties to unsupported.