fix: db query

Signed-off-by: F.N. Claessen <felix@seita.nl>

flexmeasures/ui/utils/breadcrumb_utils.py

@@ -78,7 +78,7 @@ def get_siblings(entity: Sensor | Asset | Account | None) -> list[dict]:
         else:
             session = current_app.db.session
             sibling_assets = session.scalars(
-                select(Asset).where(Asset.owner is None)
+                select(Asset).filter(Asset.account_id.is_(None))
             ).all()
 
         siblings = [