Fix scheduled operations query.

accountant/api/models/scheduled_operations.py

@@ -56,14 +56,12 @@ class ScheduledOperation(db.Model):
 
         query = session.query(
             cls
-        ).select_from(
-            session.query(cls)
-            .filter(cls.account_id == account_id)
-            .order_by(
-                desc(cls.day),
-                cls.value,
-                cls.label,
-            ).subquery()
+        ).filter(
+            cls.account_id == account_id
+        ).order_by(
+            desc(cls.day),
+            cls.value,
+            cls.label,
         )
 
         return query