diff --git a/kernel/model/attribute_view.go b/kernel/model/attribute_view.go
index 8d3b4bb36..64c1d93af 100644
--- a/kernel/model/attribute_view.go
+++ b/kernel/model/attribute_view.go
@@ -3174,7 +3174,7 @@ func replaceRelationAvValues(avID, previousID, nextID string) {
 				continue
 			}
 
-			if avID != srcKeyValues.Key.Relation.AvID {
+			if nil == srcKeyValues.Key.Relation || avID != srcKeyValues.Key.Relation.AvID {
 				continue
 			}