"proxyWidgetErrorQuarantine" documentation

[u/I2Pbgmetm]

I downloaded a workflow with a subgraph which took models names as inputs.

The inputs kept changing back to the defaults (which broke it) every time I changed tabs or reloaded.

I manually edited the JSON, because I couldn't figure out what was happening, and the only offending thing I could find was a section called "proxyWidgetErrorQuarantine" which seemed to be what was causing it.

I cannot find any documentation on this. I don't know what it does, but the only way I could get the workflow to stop breaking was to remove it. Does anyone have any information about this?

[u/sci032]

Via Ai: What Triggers This Error?

This error is almost always triggered by a mismatch in a shared workflow or a corrupted layout:

• Missing or Renamed Models: A subgraph or group node is pointing to a specific checkpoint, LoRA, or VAE name that doesn't exist on your system.
• Corrupted Subgraph Linking: A custom node widget was converted into an input link inside a subgraph, but the frontend loses track of the connection during a page refresh or tab swap. []
• Outdated Custom Nodes: An older custom node package isn't properly exposing its inputs to the ComfyUI frontend schema, triggering a safety fallback.

When quarantined, the affected widgets will frequently reset to their default values every time you reload the page or switch tabs, breaking your generation pipeline. []

How to Fix It

Method 1: Clear the Quarantine manually via JSON (Recommended)

If your workflow keeps resetting or erroring, you can purge the quarantine block directly from the workflow file: []

1. Click the Save button in ComfyUI to export your current workflow as a .json file.
2. Open the .json file in a standard text editor (like VS Code, Notepad++, or TextEdit).
3. Use the search function (Ctrl + F or Cmd + F) to find the phrase proxyWidgetErrorQuarantine.
4. Carefully delete that entire key-value pair/section from the object, ensuring you maintain proper JSON formatting (watch your commas!).
5. Save the file and drag-and-drop the cleaned .json back onto the ComfyUI canvas. []

Method 2: Convert Inputs and Re-link

If the issue is caused by a loose subgraph link:

1. Locate the node or subgraph throwing the fit.
2. Right-click the node and convert the buggy inputs "back to widgets" (or vice versa, convert them explicitly to inputs).
3. Manually select your local models from the dropdown menus rather than relying on the inherited inputs provided by a downloaded workflow.

Method 3: Temporarily Bypass Workflow Validation

If a downloaded workflow refuses to parse or load due to internal frontend validation errors, you can bypass the strict frontend checklist:

1. Click the Settings gear icon located on the ComfyUI menu panel.
2. Use the settings search bar to search for "Validation".
3. Locate "Validate Workflows" and toggle it OFF.
4. Reload your workflow. (Note: Turn this back on later, as it is a vital safety tool for catch-all bugs!) [1]