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Has anyone had any luck setting knowledgeBaseId in assistantOverrides for transient squads?  
Example of attempting to set kbID for one assistant in my squad:
      {
        "assistantId": "{{64.`get-booking-details`}}",
        "assistantOverrides": {
          "variableValues": {
            "faq": "{{64.faqs}}",
            "businesses": "{{64.businesses}}",
            "agent_name": "{{64.agent_name}}",
            "company_name": "{{64.company_name}}",
            "company_info": "{{64.company_info}}"
          },
          "model": {
            "model": "gpt-4o",
            "provider": "openai",
            "knowledgeBaseId": "{{64.knowledgebaseId}}"
          },
          "serverUrl": "{{65.webhook_url}}"
        },
Am I doing something wrong or is this not supported?