diff --git a/src/backend/langflow/graph/graph/base.py b/src/backend/langflow/graph/graph/base.py
index a3038d613..35298f3ea 100644
--- a/src/backend/langflow/graph/graph/base.py
+++ b/src/backend/langflow/graph/graph/base.py
@@ -56,6 +56,7 @@ class Graph:
         self._vertices = self._graph_data["nodes"]
         self._edges = self._graph_data["edges"]
         self.vertices_layers = []
+        self.vertices_to_run = set()
         self.stop_vertex = None
 
         self.inactive_vertices: set = set()