diff --git a/src/covid19/blueprints/europe/europe_model.py b/src/covid19/blueprints/europe/europe_model.py
index ccabe07f79129956893f7a6090af159449d030dd..14a615746940088971df04f5f631059bde919500 100644
--- a/src/covid19/blueprints/europe/europe_model.py
+++ b/src/covid19/blueprints/europe/europe_model.py
@@ -166,4 +166,5 @@ class EuropeData(db.Model):
     @classmethod
     def find_by_country(cls, europe_country, page):
         return db.session.query(cls).filter(
-            cls.europe_country_id == europe_country.id).paginate(page, per_page=ITEMS_PER_PAGE)
+            cls.europe_country_id == europe_country.id)\
+            .paginate(page, per_page=ITEMS_PER_PAGE)
diff --git a/src/covid19/blueprints/rki/rki_model.py b/src/covid19/blueprints/rki/rki_model.py
index 1ec387e40613968f216f9fe27841b5421091c709..aecc29c70efd51d7521a43c5d9da7e17ba476dfc 100644
--- a/src/covid19/blueprints/rki/rki_model.py
+++ b/src/covid19/blueprints/rki/rki_model.py
@@ -50,7 +50,7 @@ class RkiCountry(db.Model):
     @classmethod
     def remove_all(cls):
         for one in cls.get_all():
-            db.session.delete(one).cascade()
+            db.session.delete(one)
         db.session.commit()
         return None
 
@@ -119,7 +119,8 @@ class RkiGermanyData(db.Model):
 
     @classmethod
     def remove_all(cls):
-        db.session.execute("delete from " + cls.__tablename__)
+        for one in cls.get_all():
+            db.session.delete(one)
         db.session.commit()
         return None