BerriAI/litellm · error · HTTPException

Failed to update prompt

Error message

Failed to update prompt

What it means

500 raised when re-initializing the newly written prompt version in the in-memory registry returned None — the new version row was persisted but could not be activated, so the update is reported as failed.

Source

Thrown at litellm/proxy/prompts/prompt_endpoints.py:918

                "environment": environment,
                "created_by": user_api_key_dict.user_id,
                "litellm_params": request.litellm_params.model_dump_json(),
                "prompt_info": (
                    request.prompt_info.model_dump_json()
                    if request.prompt_info
                    else PromptInfo(prompt_type="db").model_dump_json()
                ),
            }
        )

        # Create versioned prompt spec
        prompt_spec: Final = create_versioned_prompt_spec(db_prompt=prompt_db_entry)

        # Initialize the new version
        initialized_prompt = IN_MEMORY_PROMPT_REGISTRY.initialize_prompt(prompt=prompt_spec, config_file_path=None)

        if initialized_prompt is None:
            raise HTTPException(status_code=500, detail="Failed to update prompt")

        return initialized_prompt

    except HTTPException as e:
        raise e
    except Exception as e:
        verbose_proxy_logger.exception("Error updating prompt: %s", e)
        raise HTTPException(status_code=500, detail=str(e))


@router.delete(
    "/prompts/{prompt_id}",
    tags=["Prompt Management"],
    dependencies=[Depends(user_api_key_auth)],
)
async def delete_prompt(
    prompt_id: str,
    environment: str | None = None,

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Check logs for the failure cause (validation or DB error); correct the update payload and retry.

When it happens

Trigger: Thrown at litellm/proxy/prompts/prompt_endpoints.py:918 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/59b5e6289f4e10bc. Report an issue: GitHub.