diff --git a/models/workflow/workflow.go b/models/workflow/workflow.go
index b9f456b..68ff7fc 100644
--- a/models/workflow/workflow.go
+++ b/models/workflow/workflow.go
@@ -237,6 +237,7 @@ func (w *Workflow) GetItemsByResources() (res map[tools.DataType]map[string][]st
 	}
 
 	for dt, meth := range dtMethodMap {
+		res[dt] = make(map[string][]string)
 		items := meth()
 		for _, i := range items {
 			_, r := i.GetResource()