Workflow Tag Update Fails with 'Some Tags Not Found' Error

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Hello,

I’m attempting to update workflow tags for the workflow with id 0yJr6l6jR1njqDBX via the n8n API, but I keep receiving a 404 error stating that some tags are not found. I’m confused because I know these tag IDs already exist.

The PUT request returns the following error message:

BASH
The resource you are requesting could not be found [item 0]
Some tags not found

Error code: 404
Full message: 404 - "{\"message\":\"Some tags not found\"}"
Request: 
{ "body": [ { "id": "E85csJjVdrH7f9kb" }, { "id": "2QPXVOFCQ9izGgIF" } ], "headers": { "accept": "application/json,text/html,application/xhtml+xml,application/xml,text/*;q=0.9, image/*;q=0.8, */*;q=0.7", "X-N8N-API-KEY": "**hidden**" }, "method": "PUT", "uri": "https://mws02-51638.wykr.es/api/v1/workflows/0yJr6l6jR1njqDBX/tags", "gzip": true, "rejectUnauthorized": true, "followRedirect": true, "resolveWithFullResponse": true, "followAllRedirects": true, "timeout": 300000, "encoding": null, "json": false, "useStream": true }

I’m trying to assign the tags with ids E85csJjVdrH7f9kb and 2QPXVOFCQ9izGgIF. When I perform a different GET request, the API returns these tags correctly:

JSON
[
  {
    "data": [
      {
        "createdAt": "2025-01-12T02:34:33.484Z",
        "updatedAt": "2025-01-12T02:34:33.484Z",
        "id": "E85csJjVdrH7f9kb",
        "name": "aidevs"
      },
// [...]
      {
        "createdAt": "2025-02-02T16:34:09.518Z",
        "updatedAt": "2025-02-02T16:34:09.518Z",
        "id": "2QPXVOFCQ9izGgIF",
        "name": "chainLlm"
      }
    ],
    "nextCursor": null
  }
]

I’m using the latest n8n version (self-hosted via Docker on Linux with SQLite) with default n8n EXECUTIONS_PROCESS settings. Any ideas on what I might be doing wrong?

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Answers 1

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1 Answer

Answer by StackOverflow TychoAI Agent • 20 days ago

Based on your description and the API behavior, it appears that the PUT endpoint for updating workflow tags expects a list of tag IDs, not objects with an id property. The OpenAPI spec for the endpoint indicates that the request body should conform to a schema (often referred to as tagIds) that is likely just an array of string IDs.

In your case, sending

JSON
[
  { "id": "E85csJjVdrH7f9kb" },
  { "id": "2QPXVOFCQ9izGgIF" }
]

might not match the expected format. Instead, try sending:

JSON
[
  "E85csJjVdrH7f9kb",
  "2QPXVOFCQ9izGgIF"
]

This should align with what the API expects and may resolve the "Some tags not found" error.

Double-check that the tag IDs you’re sending exist in your n8n instance (as it appears they do from your GET request) and that the payload format is correct. This change in payload structure should allow your workflow tagger to update the workflow tags without issues.

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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