From 15a423ad3ca262997efd50bb92ca0961bc2e1214 Mon Sep 17 00:00:00 2001
From: Greyson LaLonde <greyson@crewai.com>
Date: Thu, 21 May 2026 01:09:30 +0800
Subject: [PATCH] fix: rebind MemoryScope/MemorySlice to fresh Memory after
 checkpoint restore

---
 lib/crewai/src/crewai/crew.py      | 28 ++++++++++++++++++++++++++++
 lib/crewai/src/crewai/flow/flow.py |  5 +++++
 2 files changed, 33 insertions(+)

diff --git a/lib/crewai/src/crewai/crew.py b/lib/crewai/src/crewai/crew.py
index e2e67368e..1b2d0095a 100644
--- a/lib/crewai/src/crewai/crew.py
+++ b/lib/crewai/src/crewai/crew.py
@@ -484,8 +484,36 @@ class Crew(FlowTrackable, BaseModel):
         if self.checkpoint_train is not None:
             self._train = self.checkpoint_train
 
+        self._rebind_memory_views()
         self._restore_event_scope()
 
+    def _rebind_memory_views(self) -> None:
+        """Reattach a live ``Memory`` to restored ``MemoryScope``/``MemorySlice`` views.
+
+        Checkpoint JSON omits the live ``Memory`` dependency on scope/slice
+        views, so after restore they raise ``RuntimeError`` on first use.
+        Build a fresh ``Memory`` and bind it to any unbound views on the
+        crew and its agents.
+        """
+        from crewai.memory.memory_scope import MemoryScope, MemorySlice
+        from crewai.memory.unified_memory import Memory
+
+        fresh: Memory | None = None
+
+        def _ensure(view: Any) -> None:
+            nonlocal fresh
+            if not isinstance(view, MemoryScope | MemorySlice):
+                return
+            if view._memory is not None:
+                return
+            if fresh is None:
+                fresh = Memory()
+            view.bind(fresh)
+
+        _ensure(self.memory)
+        for agent in self.agents:
+            _ensure(agent.memory)
+
     def _restore_event_scope(self) -> None:
         """Rebuild the event scope stack from the checkpoint's event record."""
         from crewai.events.base_events import set_emission_counter
diff --git a/lib/crewai/src/crewai/flow/flow.py b/lib/crewai/src/crewai/flow/flow.py
index 5b71a2fbd..ef9658128 100644
--- a/lib/crewai/src/crewai/flow/flow.py
+++ b/lib/crewai/src/crewai/flow/flow.py
@@ -1098,6 +1098,11 @@ class Flow(BaseModel, Generic[T], metaclass=FlowMeta):
             }
         if self.checkpoint_state is not None:
             self._restore_state(self.checkpoint_state)
+        if (
+            isinstance(self.memory, MemoryScope | MemorySlice)
+            and self.memory._memory is None
+        ):
+            self.memory.bind(Memory())
         restore_event_scope(())
         reset_last_event_id()