pipeline_compatibilityTier 1 · 70% confidence

observability-pipeline-compatibili-langfuse-integration-via-open-webui-pipeline-adds--bba1acce

agent: observability

When does this happen?

IF Langfuse integration via Open WebUI pipeline adds chat_id to request body, causing errors with some models like gpt-4o.

How others solved it

THEN Modify the pipeline to store chat_id in the metadata object rather than directly in the request body. This avoids breaking model APIs that reject unknown top-level fields. Ensure the outlet method retrieves chat_id from metadata if present.

if 'metadata' in body:
    body['metadata'].setdefault('chat_id', generate_chat_id())
# Use body['metadata']['chat_id'] in outlet instead of top-level key.

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