diff --git a/src/calculation_time_constrains/router.py b/src/calculation_time_constrains/router.py
index 82004f3..e48f2e7 100644
--- a/src/calculation_time_constrains/router.py
+++ b/src/calculation_time_constrains/router.py
@@ -2,7 +2,9 @@ from typing import List, Optional, Union
 
 from fastapi import APIRouter
 from fastapi.params import Query
+import requests
 
+from src import config
 from src.auth.service import CurrentUser, InternalKey, Token
 from src.config import DEFAULT_TC_ID
 from src.database.core import DbSession
@@ -93,6 +95,10 @@ async def get_calculation_results(db_session: DbSession, calculation_id, token:I
     results = await get_calculation_result(
         db_session=db_session, calculation_id=calculation_id, token=token, include_risk_cost=include_risk_cost
     )
+    
+    requests.post(f"{config.AUTH_SERVICE_API}/sign-out", headers={
+        "Authorization": f"Bearer {token}"
+    })
 
     return StandardResponse(
         data=results,
diff --git a/src/overhaul_scope/service.py b/src/overhaul_scope/service.py
index dd1291e..4803132 100644
--- a/src/overhaul_scope/service.py
+++ b/src/overhaul_scope/service.py
@@ -161,7 +161,7 @@ async def get_overview_overhaul(*, db_session: DbSession):
         )
     )
     ongoing_result = await db_session.execute(ongoing_query.options(selectinload(OverhaulScope.maintenance_type)))
-    ongoing_overhaul = ongoing_result.first()
+    ongoing_overhaul = ongoing_result.scalar_one_or_none()
 
     # 2. If no ongoing overhaul, get the closest scheduled overhaul
     if ongoing_overhaul is None: