HKUDS/DeepTutor · error · HTTPException

Cannot delete a message while its turn is running

Error message

Cannot delete a message while its turn is running

What it means

Error "Cannot delete a message while its turn is running" thrown in HKUDS/DeepTutor.

Source

Thrown at deeptutor/api/routers/sessions.py:198

async def update_branch_selection(session_id: str, payload: BranchSelectionRequest):
    store = get_sqlite_session_store()
    session = await store.get_session(session_id)
    if session is None:
        raise HTTPException(status_code=404, detail="Session not found")
    updated = await store.update_session_preferences(
        session_id, {"selected_branches": dict(payload.selected_branches)}
    )
    if not updated:
        raise HTTPException(status_code=404, detail="Session not found")
    return {"selected_branches": payload.selected_branches}


@router.delete("/{session_id}/messages/{message_id}")
async def delete_turn_by_message(session_id: str, message_id: int):
    store = get_sqlite_session_store()
    result = await store.delete_turn_by_message(session_id, message_id)
    if result["was_running"]:
        raise HTTPException(
            status_code=409, detail="Cannot delete a message while its turn is running"
        )
    if not result["deleted"]:
        raise HTTPException(status_code=404, detail="Message not found")
    attachment_store = get_attachment_store()
    for aid in result["attachment_ids"]:
        try:
            await attachment_store.delete_attachment(session_id, aid)
        except Exception:
            logger.exception("failed to delete attachment %s for session %s", aid, session_id)
    return result


@router.post("/{session_id}/quiz-results")
async def record_quiz_results(session_id: str, payload: QuizResultsRequest):
    if not payload.answers:
        raise HTTPException(status_code=400, detail="Quiz results are required")
    store = get_sqlite_session_store()

View on GitHub (pinned to 3e82f13042)

When it happens

Trigger: Thrown at deeptutor/api/routers/sessions.py:198 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of HKUDS/DeepTutor@3e82f13042 (2026-08-27). Data as JSON: /api/errors/051ff129ce1b3810. Report an issue: GitHub.