Comfy-Org/ComfyUI · warning · ValueError

Unknown Krea 2 model: {model_choice!r}

Error message

Unknown Krea 2 model: {model_choice!r}

What it means

Client-side ValueError thrown when the Krea 2 image node's model dict contains a 'model' key not present in the _MODEL_ENDPOINTS mapping. The node cannot map the choice to a proxy endpoint path, so it refuses before any request is made.

Source

Thrown at comfy_api_nodes/nodes_krea.py:184

                  {"type":"usd","usd": $usd}
                )
                """,
            ),
        )

    @classmethod
    async def execute(
        cls,
        prompt: str,
        model: dict,
        seed: int,
    ) -> IO.NodeOutput:
        validate_string(prompt, strip_whitespace=False, min_length=1)

        model_choice = model["model"]
        endpoint_path = _MODEL_ENDPOINTS.get(model_choice)
        if endpoint_path is None:
            raise ValueError(f"Unknown Krea 2 model: {model_choice!r}")

        moodboards: list[KreaMoodboard] | None = None
        mb_id = (model.get("moodboard_id") or "").strip()
        if mb_id:
            if not _UUID_RE.match(mb_id):
                raise ValueError(f"moodboard_id must be a UUID (received {mb_id!r}); copy it from the Krea website.")
            mb_strength = model.get("moodboard_strength")
            moodboards = [KreaMoodboard(id=mb_id, strength=0.35 if mb_strength is None else float(mb_strength))]

        style_reference = model.get("style_reference")
        image_style_references: list[KreaImageStyleReference] | None = None
        if style_reference:
            if len(style_reference) > 10:
                raise ValueError(f"Krea 2 accepts at most 10 image_style_references; received {len(style_reference)}.")
            image_style_references = [
                KreaImageStyleReference(url=ref["url"], strength=float(ref["strength"])) for ref in style_reference
            ]
        initial = await sync_op(

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Re-select the model in the Krea 2 node's dropdown and re-save the workflow so the widget value matches current options.
2. Update comfy_api_nodes to the latest version so _MODEL_ENDPOINTS covers the model name in the workflow.
3. If the model is genuinely new/missing, open an issue to add it to _MODEL_ENDPOINTS.

Example fix

// before
model = {"model": "krea-2-preview-old-name", ...}
// after
model = {"model": "krea-2-pro", ...}  # a key present in _MODEL_ENDPOINTS

from comfy_api_nodes.nodes_krea import _MODEL_ENDPOINTS
if model["model"] not in _MODEL_ENDPOINTS:
    raise ValueError(f"Pick one of {sorted(_MODEL_ENDPOINTS)}")

def is_known_krea_model(model: dict) -> bool:
    return model.get("model") in _MODEL_ENDPOINTS

When it happens

Trigger: Executing Krea2ImageNode with model['model'] set to a stale/typo'd value — e.g. a workflow saved with an older widget value after the node's model list changed, or a workflow hand-edited so the combo value no longer matches any _MODEL_ENDPOINTS key.

Common situations: Loading old workflows after a comfy_api_nodes update renamed Krea model identifiers; frontend combo and backend mapping out of sync after a partial update; serialized workflow JSON edited manually.

Related errors

• moodboard_id must be a UUID (received {mb_id!r}); copy it fr
• Krea 2 accepts at most 10 image_style_references; received {
• Krea 2 accepts at most 10 image_style_references in one gene
• Total storyboard duration ({duration}s) must be between 3 an
• Durations over 10s require a 720p or 1080p resolution and 24

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/2c03d74cae1cc485. Report an issue: GitHub.