n8n - 💡(How to fix) Fix n8n workflow corrupted: editor cannot open and all updates fail with propertyValues[itemName] /d[g]is not iterable [1 comments, 2 participants]

Describe the problem/error/question

Workflow AFcYahm0Fukh37DN appears corrupted and cannot be opened reliably in the editor.
When opening the workflow, the UI redirects to a non-existing workflow view / fails to load.
Any attempt to update or save the workflow (including minimal edits, node rebuild, autofix apply, and rollback attempts) fails with iterable-related validation errors.

This also breaks runtime execution for the deferred queue path.

Affected execution example:
https://--/workflow/AFcYahm0Fukh37DN/executions/23877

What is the error message (if any)?

• propertyValues[itemName] is not iterable
• d[g] is not iterable (shown in editor)
• could not find workflow (shown in editor redirect/failure state)

Please share your workflow/screenshots/recording

Workflow URL:
https://--/workflow/AFcYahm0Fukh37DN

Relevant failing path (sanitized/minimal):

{
  "nodes": [
    {
      "name": "Schedule Deferred Queue 9AM",
      "type": "n8n-nodes-base.scheduleTrigger"
    },
    {
      "name": "Select Deferred Cutoff Queue",
      "type": "n8n-nodes-base.postgres"
    },
    {
      "name": "Block PC_OVERRIDE Deferred",
      "type": "n8n-nodes-base.if"
    },
    {
      "name": "Run Deferred Lead Outreach",
      "type": "n8n-nodes-base.executeWorkflow"
    }
  ],
  "connections": {
    "Schedule Deferred Queue 9AM": { "main": [[{ "node": "Select Deferred Cutoff Queue", "type": "main", "index": 0 }]] },
    "Select Deferred Cutoff Queue": { "main": [[{ "node": "Block PC_OVERRIDE Deferred", "type": "main", "index": 0 }]] },
    "Block PC_OVERRIDE Deferred": { "main": [[{ "node": "Run Deferred Lead Outreach", "type": "main", "index": 0 }]] }
  }
}

Share the output returned by the last node

Last successful node in failed run 23877: Select Deferred Cutoff Queue
(3 items returned)

[
  {
    "queue_id": "75",
    "lead_id": "0df944ec-3fdc-4820-99a6-d6tr776bc03b",
    "lead_status": "Deferred - Outside Business Hours",
    "next_contact_at": "2026-04-23T13:05:00.000Z"
  },
  {
    "queue_id": "76",
    "lead_id": "0000b5b6-b159-40cb-g5b6-ea9b0ef35ac2",
    "lead_status": "Deferred - Outside Business Hours",
    "next_contact_at": "2026-04-23T13:05:00.000Z"
  },
  {
    "queue_id": "70",
    "lead_id": "b7d2b9dd-c15e-4t63-a621-dafdbbc6756b",
    "lead_status": "Deferred - Outside Business Hours",
    "next_contact_at": "2026-04-23T13:05:00.000Z"
  }
]

Debug info

core

• n8nVersion: 2.17.6
• platform: docker (cloud)
• nodeJsVersion: 24.14.1
• nodeEnv: production
• database: sqlite
• executionMode: regular
• concurrency: 20
• license: enterprise (sandbox)

storage

• success: all
• error: all
• progress: false
• manual: true
• binaryMode: filesystem

pruning

• enabled: true
• maxAge: 720 hours
• maxCount: 25000 executions

client

• userAgent: mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/147.0.0.0 safari/537.36 edg/147.0.0.0
• isTouchDevice: false

Generated at: 2026-04-23T13:43:17.244Z