langflow-ai/langflow · error · HTTPException

Cannot resolve provider snapshot ids for flow_version_ids in

Error message

Cannot resolve provider snapshot ids for flow_version_ids in watsonx operations: {missing_flow_versions}

What it means

Strict helper _resolve_existing_tool_snapshot_ids: given flow_version_ids it looks up provider snapshot ids from the deployment's tool attachments and raises HTTP 422 listing every id that cannot be resolved. All operations that touch already-deployed flows (upsert remove_app_ids, remove_flows) funnel through it. A missing id means the flow version has no recorded provider snapshot for this deployment.

Source

Thrown at src/backend/base/langflow/api/v1/mappers/deployments/watsonx_orchestrate/mapper.py:1885

        db: AsyncSession,
        flow_version_ids: list[UUID],
    ) -> dict[UUID, str]:
        """Strict lookup: raises 422 if any flow_version_id is missing."""
        snapshot_map = await self._lookup_snapshot_ids(
            user_id=user_id,
            deployment_db_id=deployment_db_id,
            db=db,
            flow_version_ids=flow_version_ids,
        )
        missing_flow_versions = [
            str(flow_version_id) for flow_version_id in flow_version_ids if flow_version_id not in snapshot_map
        ]
        if missing_flow_versions:
            msg = (
                "Cannot resolve provider snapshot ids for flow_version_ids in watsonx operations: "
                f"{missing_flow_versions}"
            )
            raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=msg)
        return snapshot_map

View on GitHub (pinned to 976ec789d2)

Solutions

1. Cross-check every flow_version_id in the update payload against the deployment's current attached, snapshotted flow versions (GET the deployment first).
2. For deployments tracked via existing_agent_id, push the flows first (add_flows/upsert) so snapshot bindings exist before removing or rebinding.
3. Remove stale ids from the request and retry only with resolvable ones.
4. If attachments look wrong in the DB, re-run the full deployment update path to rebuild snapshot bindings.

snapshotted = await fetch_snapshotted_flow_version_ids(deployment_id)
all_referenced = {str(i.flow_version_id) for i in provider_data.upsert_flows if i.remove_app_ids} | {str(fv) for fv in provider_data.remove_flows}
assert all_referenced <= snapshotted, f"unresolvable flow versions: {all_referenced - snapshotted}"

def all_resolvable(referenced: set[str], snapshotted: set[str]) -> bool:
    return referenced.issubset(snapshotted)

try:
    await client.patch(deployment_url, json=body)
except HTTPError as e:
    if e.response.status_code == 422 and "Cannot resolve provider snapshot ids" in e.response.text:
        snapshotted = await fetch_snapshotted_flow_version_ids(deployment_id)
        body = filter_to_resolvable(body, snapshotted)
        # retry once with the pruned payload

When it happens

Trigger: Any wxO deployment update whose operation set references a flow_version_id without a provider_snapshot_id attachment: upsert_flows[].remove_app_ids paths and every entry of remove_flows.

Common situations: Mixing flow versions from other deployments; retrying an update after a partial failure where bindings were rolled back; deleting attachment rows manually; deployment created via existing_agent_id tracking where no snapshots were ever pushed from Langflow.

Related errors

• Cannot resolve provider snapshot ids for flow_version_ids in
• Cannot build deployment artifact: the parent flow for versio
• Flow version '{flow_version.id}' cannot be used as a deploym
• Missing deployment name while shaping wxO deployment metadat
• Created snapshot binding has empty tool_id={binding.tool_id!

AI-assisted analysis of langflow-ai/langflow@976ec789d2 (2026-08-14). Data as JSON: /api/errors/24314a73f2b0af70. Report an issue: GitHub.