Field help (TBDEFORDI) 

Use this column to define a default clustered index provided by Sage.

If you select No, a default clustered index is not defined.

If you select Yes, this is the clustered index used.

To change the clustered index, you need to define a Specific cluster index or select the Clustered index deactivated check box to not to use a clustered index.

This value can be modified by patch.

This default setting does not apply if you already set up a clustered index locally in the configuration file or in the Specific clustered index field.