diff --git a/gerrychain/graph/graph.py b/gerrychain/graph/graph.py
index bfbecfc2..b9ce446a 100644
--- a/gerrychain/graph/graph.py
+++ b/gerrychain/graph/graph.py
@@ -351,7 +351,6 @@ def __init__(self, graph: Graph):
         self.graph = networkx.classes.function.freeze(graph)
         self.graph.join = frozen
         self.graph.add_data = frozen
-        self.graph.add_data = frozen
 
         self.size = len(self.graph)