Agent + tool + conversationId throws invalid request error - Duplicate item found with id rs_xxx. Remove duplicate items from your input and try again. #425
Description
Debug information
- Agents SDK version:
v0.1.0 - Runtime environment:
Node v22.19.0
Repro steps
When running the following code from the command line:
import { Agent, run, tool } from '@openai/agents';
import { z } from 'zod';
import OpenAI from 'openai';
const getWeatherTool = tool({
name: 'get_weather',
description: 'Get the weather for a given city',
parameters: z.object({ city: z.string() }),
strict: true,
async execute({ city }) {
return `The weather in ${city} is sunny.`;
},
});
async function main() {
const client = new OpenAI();
const conversation = await client.conversations.create({});
const agent = new Agent({
name: 'Assistant',
instructions: 'You are a helpful assistant. be VERY concise.',
model: "gpt-5",
tools: [getWeatherTool],
});
const runOptions = { conversationId: conversation.id };
const result = await run(agent, "What is the weather in NYC?", runOptions);
console.log(`Output: ${result.finalOutput}`);
}
if (require.main === module) {
main().catch(console.error);
}I am getting this exception:
BadRequestError: 400 Duplicate item found with id rs_68b8366ad2848195beb3348e5860cc81029faaa0843e7ce0. Remove duplicate items from your input and try again.
at APIError.generate (/Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-openai/node_modules/openai/core/error.js:45:20)
at OpenAI.makeStatusError (/Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-openai/node_modules/openai/client.js:163:32)
at OpenAI.makeRequest (/Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-openai/node_modules/openai/client.js:308:30)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async #fetchResponse (/Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-openai/dist/openaiResponsesModel.js:733:26)
at async /Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-openai/dist/openaiResponsesModel.js:752:30
at async /Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-core/dist/tracing/createSpans.js:25:24
at async OpenAIResponsesModel.getResponse (/Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-openai/dist/openaiResponsesModel.js:751:26)
at async /Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-core/dist/run.js:167:51
at async /Users/oren/Documents/dev/opstream/opstream-frontend/packages/functions/node_modules/@openai/agents-core/dist/tracing/context.js:56:24 {
status: 400,
headers: Headers {
date: 'Wed, 03 Sep 2025 12:37:03 GMT',
'content-type': 'application/json',
'content-length': '250',
connection: 'keep-alive',
'openai-version': '2020-10-01',
'openai-organization': 'xxx',
'openai-project': 'xxx',
'x-request-id': 'req_a0f9dd423f05226476a6b9b0a2e95386',
'openai-processing-ms': '721',
'x-envoy-upstream-service-time': '725',
'strict-transport-security': 'max-age=31536000; includeSubDomains; preload',
'cf-cache-status': 'DYNAMIC',
'set-cookie': 'xxx',
'x-content-type-options': 'nosniff',
server: 'cloudflare',
'cf-ray': '97954bce8d345bd4-LIS',
'alt-svc': 'h3=":443"; ma=86400'
},
requestID: 'req_a0f9dd423f05226476a6b9b0a2e95386',
error: {
message: 'Duplicate item found with id rs_68b8366ad2848195beb3348e5860cc81029faaa0843e7ce0. Remove duplicate items from your input and try again.',
type: 'invalid_request_error',
param: 'input',
code: null
},
code: null,
param: 'input',
type: 'invalid_request_error'
}
In the Dashboard traces, it looks like it's coming from the 2nd call to the Model after the tool returns a response:
Expected behavior
Agent should load the previous inputs from the conversation and log new data to it.