diff --git a/thermostat.py b/thermostat.py
index ff3cfe2..44f883e 100644
--- a/thermostat.py
+++ b/thermostat.py
@@ -195,11 +195,11 @@ class Set_mode_thermostat(Resource):
             return "K0", 400
         try:
             db.session.add(data)
-        except sqlite3.IntegrityError:
-            logging.error("catched")
-        try:
             db.session.commit()
             return "OK", 201
+        except sqlite3.IntegrityError:
+            logging.error("catched")
+            return "K0", 400
         except Exception as e:
             logging.error(e)
             return "K0", 400