diff --git a/api/controllers/service_api/app/chatflow_memory.py b/api/controllers/service_api/app/chatflow_memory.py
index 08a855fd80..69e5590cc2 100644
--- a/api/controllers/service_api/app/chatflow_memory.py
+++ b/api/controllers/service_api/app/chatflow_memory.py
@@ -61,20 +61,32 @@ class MemoryEditApi(Resource):
         memory_spec = next((it for it in workflow.memory_blocks if it.id == args['id']), None)
         if not memory_spec:
             return {'error': 'Memory not found'}, 404
-        ChatflowMemoryService.save_memory(
-            MemoryBlock(
-                spec=memory_spec,
-                tenant_id=app_model.tenant_id,
-                value=update,
-                conversation_id=conversation_id,
-                node_id=node_id,
-                app_id=app_model.id,
-                edited_by_user=True,
-                created_by=MemoryCreatedBy(end_user_id=end_user.id),
-            ),
-            variable_pool=VariablePool(),
+
+        # First get existing memory
+        existing_memory = ChatflowMemoryService.get_memory_by_spec(
+            spec=memory_spec,
+            tenant_id=app_model.tenant_id,
+            app_id=app_model.id,
+            created_by=MemoryCreatedBy(end_user_id=end_user.id),
+            conversation_id=conversation_id,
+            node_id=node_id,
             is_draft=False
         )
+
+        # Create updated memory instance
+        updated_memory = MemoryBlock(
+            spec=existing_memory.spec,
+            tenant_id=existing_memory.tenant_id,
+            app_id=existing_memory.app_id,
+            conversation_id=existing_memory.conversation_id,
+            node_id=existing_memory.node_id,
+            value=update,  # New value
+            version=existing_memory.version,  # Keep current version (save_memory will handle version increment)
+            edited_by_user=True,
+            created_by=existing_memory.created_by,
+        )
+
+        ChatflowMemoryService.save_memory(updated_memory, VariablePool(), False)
         return '', 204
 
 
diff --git a/api/controllers/web/chatflow_memory.py b/api/controllers/web/chatflow_memory.py
index 7835a4f04d..60829b972b 100644
--- a/api/controllers/web/chatflow_memory.py
+++ b/api/controllers/web/chatflow_memory.py
@@ -61,20 +61,32 @@ class MemoryEditApi(WebApiResource):
             return {'error': 'Memory not found'}, 404
         if not memory_spec.end_user_editable:
             return {'error': 'Memory not editable'}, 403
-        ChatflowMemoryService.save_memory(
-            MemoryBlock(
-                spec=memory_spec,
-                tenant_id=app_model.tenant_id,
-                value=update,
-                conversation_id=conversation_id,
-                node_id=node_id,
-                app_id=app_model.id,
-                edited_by_user=True,
-                created_by=MemoryCreatedBy(end_user_id=end_user.id)
-            ),
-            variable_pool=VariablePool(),
+
+        # First get existing memory
+        existing_memory = ChatflowMemoryService.get_memory_by_spec(
+            spec=memory_spec,
+            tenant_id=app_model.tenant_id,
+            app_id=app_model.id,
+            created_by=MemoryCreatedBy(end_user_id=end_user.id),
+            conversation_id=conversation_id,
+            node_id=node_id,
             is_draft=False
         )
+
+        # Create updated memory instance
+        updated_memory = MemoryBlock(
+            spec=existing_memory.spec,
+            tenant_id=existing_memory.tenant_id,
+            app_id=existing_memory.app_id,
+            conversation_id=existing_memory.conversation_id,
+            node_id=existing_memory.node_id,
+            value=update,  # New value
+            version=existing_memory.version,  # Keep current version (save_memory will handle version increment)
+            edited_by_user=True,
+            created_by=existing_memory.created_by,
+        )
+
+        ChatflowMemoryService.save_memory(updated_memory, VariablePool(), False)
         return '', 204
 
 
diff --git a/api/core/memory/entities.py b/api/core/memory/entities.py
index 8ab985ad45..0cee9ad0e7 100644
--- a/api/core/memory/entities.py
+++ b/api/core/memory/entities.py
@@ -1,10 +1,13 @@
+from __future__ import annotations
+
 from enum import StrEnum
-from typing import Optional
+from typing import TYPE_CHECKING, Optional
 from uuid import uuid4
 
 from pydantic import BaseModel, Field
 
-from core.app.app_config.entities import ModelConfig
+if TYPE_CHECKING:
+    from core.app.app_config.entities import ModelConfig
 
 
 class MemoryScope(StrEnum):
@@ -75,6 +78,7 @@ class MemoryBlock(BaseModel):
     node_id: Optional[str] = None
     edited_by_user: bool = False
     created_by: MemoryCreatedBy
+    version: int = Field(description="Memory block version number")
 
 
 class MemoryValueData(BaseModel):
diff --git a/api/services/chatflow_memory_service.py b/api/services/chatflow_memory_service.py
index 3bcfa201e6..f82d451a2c 100644
--- a/api/services/chatflow_memory_service.py
+++ b/api/services/chatflow_memory_service.py
@@ -210,6 +210,7 @@ class ChatflowMemoryService:
                         node_id=node_id,
                         spec=spec,
                         created_by=created_by,
+                        version=1,
                     )
             stmt = select(ChatflowMemoryVariable).where(
                 and_(
@@ -234,6 +235,7 @@ class ChatflowMemoryService:
                     spec=spec,
                     edited_by_user=memory_value_data.edited_by_user,
                     created_by=created_by,
+                    version=result.version,
                 )
             return MemoryBlock(
                 tenant_id=tenant_id,
@@ -243,6 +245,7 @@ class ChatflowMemoryService:
                 node_id=node_id,
                 spec=spec,
                 created_by=created_by,
+                version=1,
             )
 
     @staticmethod
@@ -412,6 +415,7 @@ class ChatflowMemoryService:
                         node_id=chatflow_memory_variable.node_id,
                         edited_by_user=memory_value_data.edited_by_user,
                         created_by=created_by,
+                        version=chatflow_memory_variable.version,
                     )
                 )
         return results
@@ -551,6 +555,7 @@ class ChatflowMemoryService:
             node_id=memory_block.node_id,
             edited_by_user=False,
             created_by=memory_block.created_by,
+            version=memory_block.version,
         )
         ChatflowMemoryService.save_memory(updated_memory, variable_pool, is_draft)