This action deletes a personal substitute from a Workflow work item. For this, you need to implement the HTTP DELETE operation on the Substitution Collection.
To delete a personal substitute:
On the SAP Gateway system, go to transaction SPRO.
Choose SAP Reference IMG and navigate to .
Select the Workflow service.
Choose Call Browser.
Navigate to the SubstitutionCollection.
Select the entry you wish to delete.
Execute a DELETE request on the entry's ID.