manager创建的Project群聊到一定程度manager和worker一直是 Unhandled stop reason: model_context_window_exceeded || The Project group chat created by manager has been Unhandled to a certain extent. stop reason: model_context_window_exceeded

如题，好像没有进行上下文压缩导致，manager给我的说法是：

根本原因：项目房间（group chat）有大量历史消息，每次 OpenClaw 启动都会从 Matrix 服务端拉取所有历史消息重建会话上下文。

请问要如何解决？

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As the title states, it seems that context compression was not performed. The manager told me this:

Root cause: The project room (group chat) has a large number of historical messages. Every time OpenClaw is started, all historical messages will be pulled from the Matrix server to rebuild the session context.

How to solve it?