[BUG] duplicated last trace interaction in the memory

[jngz-es]

What is the bug?
Conversational agent creates a duplicated last trace interaction in the memory for every question.

An example,

GET /_plugins/_ml/memory/message/a9W4XI0BS7ZuQOvZJ8pt/traces

// The response
{
  "traces": [
    ......,
    {
      "memory_id": "atW4XI0BS7ZuQOvZJ8ph",
      "message_id": "ctW4XI0BS7ZuQOvZcsoL",
      "create_time": "2024-01-30T23:33:28.202188Z",
      "input": "how many index I have?",
      "prompt_template": null,
      "response": "Unfortunately, without access to the tools, I do not have enough information to determine the number of indexes you currently have.",
      "origin": null,
      "additional_info": {},
      "parent_message_id": "a9W4XI0BS7ZuQOvZJ8pt",
      "trace_number": 8
    },
    {
      "memory_id": "atW4XI0BS7ZuQOvZJ8ph",
      "message_id": "dNW4XI0BS7ZuQOvZcsoL",
      "create_time": "2024-01-30T23:33:28.202477Z",
      "input": "how many index I have?",
      "prompt_template": null,
      "response": "Unfortunately, without access to the tools, I do not have enough information to determine the number of indexes you currently have.",
      "origin": null,
      "additional_info": {},
      "parent_message_id": "a9W4XI0BS7ZuQOvZJ8pt",
      "trace_number": 9
    }
  ]
}

How can one reproduce the bug?
Steps to reproduce the behavior:

1. create a coversational agent.
2. execute the agent.

What is the expected behavior?
A duplicated last trace in the memory.

What is your host/environment?

• OS: [linux]
• Version []
• Plugins

Do you have any screenshots?
If applicable, add screenshots to help explain your problem.

Do you have any additional context?
Add any other context about the problem.