App submitted and approved, question about app updates

I’d like to ask whether you have already gone through such an upgrade. When submitting the upgrade request, the MCP Server URL points to your new application, meaning that you have actually switched to the new MCP Server on the backend. In that case, when users access the system, how does the old MCP Server retrieve backend data? Since the MCP Server URL points to the new application, how does its cache obtain the code from the old MCP Server? If the MCP Server schema changes, will the widget fail to fetch data for display?