{"record":{"id":"4253bf9a14edb2a9","repo":"langflow-ai/langflow","slug":"unexpected-source-ref-in-update-snapshot-bindings","errorCode":null,"errorMessage":"Unexpected source_ref in update snapshot bindings: {unexpected_source_refs}","messagePattern":"Unexpected source_ref in update snapshot bindings: (.+?)","errorType":"http","errorClass":"HTTPException","httpStatus":500,"severity":"error","filePath":"src/backend/base/langflow/api/v1/mappers/deployments/helpers.py","lineNumber":1163,"sourceCode":"    added_flow_version_ids: list[UUID],\n    result: DeploymentUpdateResult,\n) -> list[tuple[UUID, str]]:\n    if not added_flow_version_ids:\n        return []\n    bindings = deployment_mapper.util_update_snapshot_bindings(\n        result=result,\n    )\n    bindings_by_source_ref = bindings.to_source_ref_map()\n    expected_source_ref_to_flow_version_id: dict[str, UUID] = {\n        str(flow_version_id): flow_version_id for flow_version_id in added_flow_version_ids\n    }\n\n    unexpected_source_refs = sorted(\n        source_ref for source_ref in bindings_by_source_ref if source_ref not in expected_source_ref_to_flow_version_id\n    )\n    if unexpected_source_refs:\n        msg = f\"Unexpected source_ref in update snapshot bindings: {unexpected_source_refs}\"\n        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=msg)\n\n    snapshot_bindings: list[tuple[UUID, str]] = []\n    missing_source_refs: list[str] = []\n    for source_ref, flow_version_id in expected_source_ref_to_flow_version_id.items():\n        snapshot_id = bindings_by_source_ref.get(source_ref)\n        if snapshot_id is None:\n            missing_source_refs.append(source_ref)\n            continue\n        snapshot_bindings.append((flow_version_id, snapshot_id))\n    if missing_source_refs:\n        msg = f\"Missing snapshot bindings for added flow versions on update: {missing_source_refs}\"\n        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=msg)\n    return snapshot_bindings\n","sourceCodeStart":1145,"sourceCodeEnd":1177,"githubUrl":"https://github.com/langflow-ai/langflow/blob/976ec789d2886a86de109c044d089d68e96c9a35/src/backend/base/langflow/api/v1/mappers/deployments/helpers.py#L1145-L1177","documentation":"Error \"Unexpected source_ref in update snapshot bindings: {unexpected_source_refs}\" thrown in langflow-ai/langflow.","triggerScenarios":"Occurs when an update-time snapshot binding contains source_refs that do not correspond to any attached flow version.","commonSituations":"See trigger scenarios.","solutions":["Check the provider update response; a snapshot binding references an unexpected source_ref. Retry or report the provider integration issue."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"976ec789d2886a86de109c044d089d68e96c9a35","analyzedAt":"2026-08-14T18:23:12.227Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}