langflow-ai/langflow · error · HTTPException

Deployment provider create result is missing required snapsh

Error message

Deployment provider create result is missing required snapshot bindings.

What it means

Error "Deployment provider create result is missing required snapshot bindings." thrown in langflow-ai/langflow.

Source

Thrown at src/backend/base/langflow/api/v1/mappers/deployments/helpers.py:559

    default_folder = await get_or_create_default_folder(db, user_id)
    return default_folder.id


def resolve_snapshot_map_for_create(
    *,
    deployment_mapper: BaseDeploymentMapper,
    result: AdapterDeploymentCreateResult,
    flow_version_ids: list[UUID],
) -> dict[UUID, str]:
    if not flow_version_ids:
        return {}
    bindings = deployment_mapper.util_create_snapshot_bindings(
        result=result,
    )
    bindings_by_source_ref = bindings.to_source_ref_map()
    if not bindings_by_source_ref:
        msg = "Deployment provider create result is missing required snapshot bindings."
        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=msg)
    expected_source_ref_to_flow_version_id = {
        str(flow_version_id): flow_version_id for flow_version_id in flow_version_ids
    }
    if len(bindings_by_source_ref) != len(expected_source_ref_to_flow_version_id):
        msg = (
            f"Snapshot binding count mismatch on create: {len(expected_source_ref_to_flow_version_id)} "
            f"flow versions vs {len(bindings_by_source_ref)} snapshot bindings"
        )
        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=msg)
    snapshot_id_by_flow_version_id: dict[UUID, str] = {}
    for source_ref, snapshot_id in bindings_by_source_ref.items():
        flow_version_id = expected_source_ref_to_flow_version_id.get(source_ref)
        if flow_version_id is None:
            msg = f"Unexpected source_ref in create snapshot bindings: {source_ref}"
            raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=msg)
        snapshot_id_by_flow_version_id[flow_version_id] = snapshot_id
    return snapshot_id_by_flow_version_id

View on GitHub (pinned to 976ec789d2)

Solutions

1. Retry the create; if it persists, check the deployment provider integration for an incomplete create response.

When it happens

Trigger: Occurs when the deployment provider's create response omits required snapshot bindings for the attached flow versions.

Common situations: See trigger scenarios.

AI-assisted analysis of langflow-ai/langflow@976ec789d2 (2026-08-14). Data as JSON: /api/errors/2959da78aa6871f1. Report an issue: GitHub.