WS-928: Added fix for when execution is null

shared/workspaces/workspaces/capability/services/capability_service.py

@@ -152,6 +152,9 @@ class CapabilityService(CapabilityServiceIF):
 
         execution = self.capability_info.lookup_execution_by_workflow_request_id(subject["workflow_request_id"])
 
+        if execution == None:
+            return
+
         # Update the database
         execution.version.workflow_metadata = copy.deepcopy(execution.version.workflow_metadata)