bytedance/deer-flow · error · HTTPException

{error} (fallback: Scheduled task trigger conflicted with an

Error message

{error} (fallback: Scheduled task trigger conflicted with an active run)

What it means

Error "{error} (fallback: Scheduled task trigger conflicted with an active run)" thrown in bytedance/deer-flow.

Source

Thrown at backend/app/gateway/routers/scheduled_tasks.py:266

    if updated is None:
        raise HTTPException(status_code=404, detail="Scheduled task not found")
    return updated


@router.post("/scheduled-tasks/{task_id}/trigger")
@require_permission("threads", "write")
async def trigger_scheduled_task(task_id: str, request: Request):
    repo = get_scheduled_task_repo(request)
    service = get_scheduled_task_service(request)
    user = await get_optional_user_from_request(request)
    if user is None:
        raise HTTPException(status_code=401, detail="Authentication required")
    task = await repo.get(task_id, user_id=str(user.id))
    if task is None:
        raise HTTPException(status_code=404, detail="Scheduled task not found")
    result = await service.dispatch_task(task, now=datetime.now(UTC), trigger="manual")
    if result["outcome"] == "conflict":
        raise HTTPException(status_code=409, detail=result["error"] or "Scheduled task trigger conflicted with an active run")
    if result["outcome"] == "failed":
        raise HTTPException(status_code=502, detail=result["error"] or "Scheduled task trigger failed")
    return {"id": task_id, "triggered": True}


@router.delete("/scheduled-tasks/{task_id}")
@require_permission("threads", "write")
async def delete_scheduled_task(task_id: str, request: Request):
    repo = get_scheduled_task_repo(request)
    user = await get_optional_user_from_request(request)
    if user is None:
        raise HTTPException(status_code=401, detail="Authentication required")
    deleted = await repo.delete(task_id, user_id=str(user.id))
    if not deleted:
        raise HTTPException(status_code=404, detail="Scheduled task not found")
    return {"id": task_id, "deleted": deleted}

View on GitHub (pinned to 1dd6ba1acb)

Solutions

1. Wait for the active run of the scheduled task to finish, then trigger it again.
2. If the run is stuck, inspect run state in the console and cancel it before retriggering.

When it happens

Trigger: Thrown at backend/app/gateway/routers/scheduled_tasks.py:266 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bytedance/deer-flow@1dd6ba1acb (2026-08-14). Data as JSON: /api/errors/6d3cc7c50d5b6422. Report an issue: GitHub.