diff --git a/models/workflow/workflow_mongo_accessor.go b/models/workflow/workflow_mongo_accessor.go
index 048fcce..f0d74e1 100644
--- a/models/workflow/workflow_mongo_accessor.go
+++ b/models/workflow/workflow_mongo_accessor.go
@@ -216,7 +216,7 @@ func (a *workflowMongoAccessor) verifyResource(obj utils.DBObject) utils.DBObjec
 		} else {
 			wf.Graph.Clear(item.Data.GetID())
 		}
-		if error := utils.VerifyAccess(access, resource.GetID()); error != nil {
+		if error := utils.VerifyAccess(access, resource.GetID()); wf.Graph != nil && error != nil {
 			wf.Graph.Clear(item.Data.GetID())
 		}
 	}