Comfy-Org/ComfyUI · warning · ValueError

Krea 2 accepts at most 10 image_style_references in one gene

Error message

Krea 2 accepts at most 10 image_style_references in one generation.

What it means

Client-side ValueError from Krea2StyleReferenceNode: the accumulated style-reference chain already has 10 entries, so appending one more would exceed Krea 2's per-generation limit of 10 image_style_references. The check uses >= 10 before appending, capping the chain at 10 total.

Source

Thrown at comfy_api_nodes/nodes_krea.py:278

            ],
            outputs=[IO.Custom(KreaIO.STYLE_REF).Output(display_name="style_reference")],
            hidden=[
                IO.Hidden.auth_token_comfy_org,
                IO.Hidden.api_key_comfy_org,
                IO.Hidden.unique_id,
            ],
        )

    @classmethod
    async def execute(
        cls,
        image: Input.Image,
        strength: float,
        style_reference: list[dict] | None = None,
    ) -> IO.NodeOutput:
        chain: list[dict] = list(style_reference) if style_reference else []
        if len(chain) >= 10:
            raise ValueError("Krea 2 accepts at most 10 image_style_references in one generation.")
        url = await _upload_image_to_krea_assets(cls, image)
        chain.append({"url": url, "strength": float(strength)})
        return IO.NodeOutput(chain)


class KreaExtension(ComfyExtension):
    @override
    async def get_node_list(self) -> list[type[IO.ComfyNode]]:
        return [
            Krea2ImageNode,
            Krea2StyleReferenceNode,
        ]


async def comfy_entrypoint() -> KreaExtension:
    return KreaExtension()

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Stop at 10 style-reference nodes; remove or bypass the 11th.
2. Rebalance: delete low-strength references and re-add only the ones that matter.
3. Route additional styling through a moodboard (moodboard_id) which is separate from the reference cap.

chain = list(style_reference) if style_reference else []
if len(chain) >= 10:
    raise ValueError("Style-reference chain is full (10); remove one before adding another")

def can_append_style_ref(chain: list[dict]) -> bool:
    return len(chain) < 10

When it happens

Trigger: Chaining a Krea2StyleReferenceNode whose style_reference input already carries 10 entries — i.e. an 11th reference is being added to the list passed between these nodes.

Common situations: Autogrow chains of style-reference nodes built by duplicating nodes in the graph; feeding a previously-completed 10-entry chain back into another reference node to add 'just one more'.

Related errors

• Krea 2 accepts at most 10 image_style_references; received {
• Unknown Krea 2 model: {model_choice!r}
• moodboard_id must be a UUID (received {mb_id!r}); copy it fr
• 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/9c4fea1215400a87. Report an issue: GitHub.