Suppression Scope
The Field column indicates the scope of the message suppression (for example: Party Id, Document Id, or Line Item Id).
Note: Logging must be enabled and the scope variable must be mapped to a field
in the response table in order for duplicate suppression to work.
All responses for a particular message suppression scope (such as Party ID) are loaded with a single query and cached until the scope changes, for example, with a new caller.
For further information, see Suppressing Duplicate Messages.