diff --git a/comfy_api/latest/_caching.py b/comfy_api/latest/_caching.py
index 686c99969..30c8848cd 100644
--- a/comfy_api/latest/_caching.py
+++ b/comfy_api/latest/_caching.py
@@ -5,7 +5,6 @@ from dataclasses import dataclass
 
 @dataclass
 class CacheContext:
-    prompt_id: str
     node_id: str
     class_type: str
     cache_key_hash: str  # SHA256 hex digest
diff --git a/comfy_execution/cache_provider.py b/comfy_execution/cache_provider.py
index 20bb51b7c..d455d08e8 100644
--- a/comfy_execution/cache_provider.py
+++ b/comfy_execution/cache_provider.py
@@ -73,9 +73,12 @@ def _canonicalize(obj: Any) -> Any:
     elif isinstance(obj, list):
         return [_canonicalize(item) for item in obj]
     elif isinstance(obj, dict):
-        return {str(k): _canonicalize(v) for k, v in sorted(obj.items())}
+        return {"__dict__": sorted(
+            [[_canonicalize(k), _canonicalize(v)] for k, v in obj.items()],
+            key=lambda x: json.dumps(x, sort_keys=True)
+        )}
     elif isinstance(obj, (int, float, str, bool, type(None))):
-        return obj
+        return (type(obj).__name__, obj)
     elif isinstance(obj, bytes):
         return ("__bytes__", obj.hex())
     else:
diff --git a/comfy_execution/caching.py b/comfy_execution/caching.py
index e11990feb..c5782d44a 100644
--- a/comfy_execution/caching.py
+++ b/comfy_execution/caching.py
@@ -156,8 +156,6 @@ class BasicCache:
         self.cache = {}
         self.subcaches = {}
 
-        self._current_prompt_id = ''
-
     async def set_prompt(self, dynprompt, node_ids, is_changed_cache):
         self.dynprompt = dynprompt
         self.cache_key_set = self.key_class(dynprompt, node_ids, is_changed_cache)
@@ -319,7 +317,6 @@ class BasicCache:
             if cache_key_hash is None:
                 return None
             return CacheContext(
-                prompt_id=self._current_prompt_id,
                 node_id=node_id,
                 class_type=self._get_class_type(node_id),
                 cache_key_hash=cache_key_hash,
@@ -333,7 +330,6 @@ class BasicCache:
         subcache = self.subcaches.get(subcache_key, None)
         if subcache is None:
             subcache = BasicCache(self.key_class)
-            subcache._current_prompt_id = self._current_prompt_id
             self.subcaches[subcache_key] = subcache
         await subcache.set_prompt(self.dynprompt, children_ids, self.is_changed_cache)
         return subcache
diff --git a/execution.py b/execution.py
index 6d963d640..3d80606b4 100644
--- a/execution.py
+++ b/execution.py
@@ -714,9 +714,6 @@ class PromptExecutor:
         self.status_messages = []
         self.add_message("execution_start", { "prompt_id": prompt_id}, broadcast=False)
 
-        for cache in self.caches.all:
-            cache._current_prompt_id = prompt_id
-
         self._notify_prompt_lifecycle("start", prompt_id)
 
         try:
diff --git a/tests-unit/execution_test/test_cache_provider.py b/tests-unit/execution_test/test_cache_provider.py
index ccbad88ce..ac3814746 100644
--- a/tests-unit/execution_test/test_cache_provider.py
+++ b/tests-unit/execution_test/test_cache_provider.py
@@ -69,25 +69,28 @@ class TestCanonicalize:
         result = _canonicalize(t)
 
         assert result[0] == "__tuple__"
-        assert result[1] == [1, 2, 3]
 
     def test_list_preserved(self):
         """Lists should be recursively canonicalized."""
         lst = [{"b": 2, "a": 1}, frozenset([3, 2, 1])]
         result = _canonicalize(lst)
 
-        # First element should be dict with sorted keys
-        assert result[0] == {"a": 1, "b": 2}
+        # First element should be canonicalized dict
+        assert "__dict__" in result[0]
         # Second element should be canonicalized frozenset
         assert result[1][0] == "__frozenset__"
 
-    def test_primitives_unchanged(self):
-        """Primitive types should pass through unchanged."""
-        assert _canonicalize(42) == 42
-        assert _canonicalize(3.14) == 3.14
-        assert _canonicalize("hello") == "hello"
-        assert _canonicalize(True) is True
-        assert _canonicalize(None) is None
+    def test_primitives_include_type(self):
+        """Primitive types should include type name for disambiguation."""
+        assert _canonicalize(42) == ("int", 42)
+        assert _canonicalize(3.14) == ("float", 3.14)
+        assert _canonicalize("hello") == ("str", "hello")
+        assert _canonicalize(True) == ("bool", True)
+        assert _canonicalize(None) == ("NoneType", None)
+
+    def test_int_and_str_distinguished(self):
+        """int 7 and str '7' must produce different canonical forms."""
+        assert _canonicalize(7) != _canonicalize("7")
 
     def test_bytes_converted(self):
         """Bytes should be converted to hex string."""
@@ -364,13 +367,11 @@ class TestCacheContext:
     def test_context_creation(self):
         """CacheContext should be created with all fields."""
         context = CacheContext(
-            prompt_id="prompt-123",
             node_id="node-456",
             class_type="KSampler",
             cache_key_hash="a" * 64,
         )
 
-        assert context.prompt_id == "prompt-123"
         assert context.node_id == "node-456"
         assert context.class_type == "KSampler"
         assert context.cache_key_hash == "a" * 64