fix memory nodes

packages/components/nodes/memory/DynamoDb/DynamoDb.ts

@@ -109,9 +109,8 @@ const initalizeDynamoDB = async (nodeData: INodeData, options: ICommonObject): P
     })
 
     const memory = new BufferMemoryExtended({
-        memoryKey,
+        memoryKey: memoryKey ?? 'chat_history',
         chatHistory: dynamoDb,
-        returnMessages: true,
         isSessionIdUsingChatMessageId
     })
     return memory

packages/components/nodes/memory/MongoDBMemory/MongoDBMemory.ts

@@ -123,9 +123,8 @@ const initializeMongoDB = async (nodeData: INodeData, options: ICommonObject): P
     }
 
     return new BufferMemoryExtended({
-        memoryKey,
+        memoryKey: memoryKey ?? 'chat_history',
         chatHistory: mongoDBChatMessageHistory,
-        returnMessages: true,
         isSessionIdUsingChatMessageId
     })
 }

packages/components/nodes/memory/RedisBackedChatMemory/RedisBackedChatMemory.ts

@@ -137,7 +137,7 @@ const initalizeRedis = async (nodeData: INodeData, options: ICommonObject): Prom
     }
 
     const memory = new BufferMemoryExtended({
-        memoryKey,
+        memoryKey: memoryKey ?? 'chat_history',
         chatHistory: redisChatMessageHistory,
         isSessionIdUsingChatMessageId
     })

packages/components/nodes/memory/UpstashRedisBackedChatMemory/UpstashRedisBackedChatMemory.ts

@@ -95,6 +95,7 @@ const initalizeUpstashRedis = async (nodeData: INodeData, options: ICommonObject
     })
 
     const memory = new BufferMemoryExtended({
+        memoryKey: 'chat_history',
         chatHistory: redisChatMessageHistory,
         isSessionIdUsingChatMessageId
     })