Field help (KASWKEY)

The Key field must however be used in very specific cases. If the storage table is BP or Prospect/Customer, this field indicates the field name of the call record that contains the BP code.
If the storage table is Contacts, this field indicates the field name of the call record that contains the Contact code.
If the call record structure has not been modified, the field name suggested by default will always be correct.
On the other hand, if the Call object has been set up or modified relative to one of these two fields, the user must then check the contents of this field. In this case, the user must enter the new name of the field here that contains either the BP code or the Contact code in a Call record.