diff --git a/comfy_execution/caching.py b/comfy_execution/caching.py
index 326a279fc..f8a14e715 100644
--- a/comfy_execution/caching.py
+++ b/comfy_execution/caching.py
@@ -117,6 +117,8 @@ class CacheKeySetInputSignature(CacheKeySet):
             signature.append(node_id)
         inputs = node["inputs"]
         for key in sorted(inputs.keys()):
+            if key.startswith("$$"):
+                continue
             if is_link(inputs[key]):
                 (ancestor_id, ancestor_socket) = inputs[key]
                 ancestor_index = ancestor_order_mapping[ancestor_id]