Fix up cron database check

app/models.py

@@ -731,7 +731,7 @@ class Tracks(Base):
     def get_all(cls, session) -> List["Tracks"]:
         """Return a list of all tracks"""
 
-        return session.execute(select(cls)).scalars().all()
+        return session.execute(select(cls)).scalars().unique().all()
 
     @classmethod
     def get_by_path(cls, session: scoped_session, path: str) -> Optional["Tracks"]:
@@ -742,7 +742,7 @@ class Tracks(Base):
         try:
             return session.execute(
                 select(Tracks).where(Tracks.path == path)
-            ).scalar_one()
+            ).unique().scalar_one()
         except NoResultFound:
             return None