A set cannot be added to the PivotTable report at the same time as the fields on which the set is based, or at the same time ...

A set cannot be added to the PivotTable report at the same time as the fields on which the set is based, or at the same time as other sets that are based on the same fields. Do you want to add the fields or sets?Click OK to add the "|0" set and remove the following fields and sets:|1