PD: New field "No recursiveness check"
Description
For Release 3.0E, the field "No recursiveness check" has been added to table T77AR (Relationship Supplements). If this field is activated in the standard SAP System, a recursiveness check is not carried out when relationships of this type are created using the standard transactions PP01, PP02, PP03 or PQnn, POnn. In other words, activate this field if you want to create recursive relationships (for example, for substitute and equivalence relations).
You can also deactivate the recursiveness check for your own relationships.
Change system parameters in customizing
For more information, please see Customizing, Global settings for Personnel
Planning and Development, 
"Maintain relationships.