Dialogflow knowledge base not working in mega agent

Question

Dialogflow Knowledge base not working in Mega agent , its showing knowledge base connector error

intent call

  'method': 'POST',
    'url': 'https://dialogflow.googleapis.com/v2beta1/projects/xxxxxxx/agent/sessions/123456789:detectIntent',
    'headers': {
      'Authorization': 'Bearer ' + token,
      'content-type': 'application/json'
    },
    body: JSON.stringify({
      "queryInput": { "text": { "text": text, "language_code": "en-US" } },
      "queryParams": {

        "subAgents": [
          { "project": "projects/xxxxxxxxxxx" },
          { "project": "projects/xxxxxxx" },

          { "project": "projects/xxxxxxxxxx" },
          


        ]
      }
    })

getting error after searching knowledge base questions.

    diagnosticInfo: {
      knowledge_connector_error: "INVALID_ARGUMENT: UNAUTHORIZED: You can't query KnowledgeBase under project: xxxxxx, which is different than your agent project: xxxxxx"
    },
    languageCode: 'en',
    sentimentAnalysisResult: { queryTextSentiment: [Object] }