fixing pre-commit hooks

Author: ayushjariyal

src/aiida/orm/implementation/storage_backend.py

@@ -491,7 +491,7 @@ def get_orm_entities(self, detailed: bool = False) -> dict:
             mtime = last_time.first()
 
             data['Nodes']['first_created'] = str(ctime[0]) if ctime else None
-            data['Nodes']['last_created'] = str(ctime[0]) if ctime else None
+            data['Nodes']['last_created'] = str(mtime[0]) if mtime else None
 
 
         query_group = QueryBuilder(self).append(Group, project=['type_string'])