We’re trying to push a proactive notification to a guest who had a session yesterday using the JS SDK. The docs mention startConversation, but it seems to only work for fresh sessions. I tried passing the previous conversationId in the options, but the SDK throws a validation error saying the ID is invalid. Is there a specific API endpoint we need to hit first to ‘reactivate’ the context before calling startConversation? Here’s the error payload I’m seeing in the console.