By default, outlines require that member names are unique within the outline. If you want to allow duplicate member names in an existing unique outline, you can convert the outline to allow duplicate members. Once an outline is converted, it cannot be changed back to unique.
By default, all dimensions in a duplicate member name outline allow duplicate member names. You can tag one or more dimensions as unique in a duplicate member name outline to require unique member names in that particular dimension.
To create a duplicate member name outline:
Select the Properties tab.
Save any unsaved changes you have made to the outline.
Next to the Duplicate member names allowed node, select true from the drop-down list.
Save the outline before proceeding with any other outline changes.
Note:
After you change the setting to true and save the outline, the outline cannot be converted back to a unique member outline.
If you want to require unique member names in any dimension, tag the dimension as unique.
You can now create duplicate member names in the dimensions you tagged to allow duplicate members.
In dimensions that allow duplicate member names, if you want to require unique member names in a particular generation or level, specify the generation or level as unique.